# 3DEC **URL:** https://forum.itascainternational.com/c/3dec/6.md?page=2 [Latest](https://forum.itascainternational.com/latest.md) · [Categories](https://forum.itascainternational.com/categories.md) · [Tags](https://forum.itascainternational.com/tags.md) **Page:** 3 --- ## [Import file in 3DEC](https://forum.itascainternational.com/t/import-file-in-3dec/1650)
**Author:** [@huda](https://forum.itascainternational.com/u/huda)\ **Replies:** 2\ **Last updated:** [August 28, 2024, 5:39am UTC](https://forum.itascainternational.com/t/import-file-in-3dec/1650 "2024-08-28T05:39:00Z")
hello everyone, after import geometry from AutoCAD there is no plot appear? --- ## [Issue when plotting stereonet and axes (potential bug?)](https://forum.itascainternational.com/t/issue-when-plotting-stereonet-and-axes-potential-bug/1653)
**Author:** [@JuliusL](https://forum.itascainternational.com/u/JuliusL)\ **Replies:** 1\ **Last updated:** [August 23, 2024, 1:58pm UTC](https://forum.itascainternational.com/t/issue-when-plotting-stereonet-and-axes-potential-bug/1653 "2024-08-23T13:58:39Z")
I’m experiencing some issues when trying to plot both a stereonet and an axes in 3DEC (a blue background of sorts appears in the stereonet which is undesired). Both stereonet and axes plot as expected when plotted separa… --- ## [Node does not have a link while importing cables in 3DEC](https://forum.itascainternational.com/t/node-does-not-have-a-link-while-importing-cables-in-3dec/1642)
**Author:** [@Vijaybhvs](https://forum.itascainternational.com/u/Vijaybhvs)\ **Replies:** 2\ **Last updated:** [August 22, 2024, 9:34am UTC](https://forum.itascainternational.com/t/node-does-not-have-a-link-while-importing-cables-in-3dec/1642 "2024-08-22T09:34:47Z")
An error is being displayed while importing cables from dxf file that the node does not have a link. How to identify the nodes and fix this error --- ## [Missing value in Information panel](https://forum.itascainternational.com/t/missing-value-in-information-panel/1641)
**Author:** [@Vijaybhvs](https://forum.itascainternational.com/u/Vijaybhvs)\ **Replies:** 2\ **Last updated:** [August 21, 2024, 6:54am UTC](https://forum.itascainternational.com/t/missing-value-in-information-panel/1641 "2024-08-21T06:54:41Z")
When we toggle the mouse the value in the information panel shows zero in 3DEC version 9.0 be it displacements/stresses etc. --- ## [How to display/plot zone in 3DEC](https://forum.itascainternational.com/t/how-to-display-plot-zone-in-3dec/1640)
**Author:** [@Vijaybhvs](https://forum.itascainternational.com/u/Vijaybhvs)\ **Replies:** 2\ **Last updated:** [August 21, 2024, 6:26am UTC](https://forum.itascainternational.com/t/how-to-display-plot-zone-in-3dec/1640 "2024-08-21T06:26:06Z")
How to plot a specific zone in 3DEC --- ## [Solving Null Pointer Error in 3DEC FISH](https://forum.itascainternational.com/t/solving-null-pointer-error-in-3dec-fish/1631)
**Author:** [@Mahdi.S](https://forum.itascainternational.com/u/Mahdi.S)\ **Replies:** 2\ **Last updated:** [August 14, 2024, 10:05pm UTC](https://forum.itascainternational.com/t/solving-null-pointer-error-in-3dec-fish/1631 "2024-08-14T22:05:55Z")
Hi everyone, I have created a simple function to monitor damage in a UCS test in 3DEC. The function runs for several numerical steps but after that I get an abrupt error: “Unable to convert parameter type from Null Po… --- ## [Fracture Percolation](https://forum.itascainternational.com/t/fracture-percolation/1628)
**Author:** [@lucasbmachado](https://forum.itascainternational.com/u/lucasbmachado)\ **Replies:** 3\ **Last updated:** [August 13, 2024, 1:29pm UTC](https://forum.itascainternational.com/t/fracture-percolation/1628 "2024-08-13T13:29:27Z")
Hello, 3DEC has functions and commands for percolation calculation such as “fracture.percolation” and “fracture compute percolation,” but I can’t understand how it calculates this index and what it is based on. Is there… --- ## [Encrypting Python Script in 3DEC](https://forum.itascainternational.com/t/encrypting-python-script-in-3dec/1624)
**Author:** [@Mahdi.S](https://forum.itascainternational.com/u/Mahdi.S)\ **Replies:** 3\ **Last updated:** [August 8, 2024, 11:42pm UTC](https://forum.itascainternational.com/t/encrypting-python-script-in-3dec/1624 "2024-08-08T23:42:02Z")
Hi Everyone, I have tried to use “program encrypt” command to encrypt a Python file. The command works and creates the encrypted file, but I cannot call the encrypted file again using “program call” command. Please let… --- ## [Creating Elongated Voronoi in 3DEC](https://forum.itascainternational.com/t/creating-elongated-voronoi-in-3dec/1605)
**Author:** [@Akash](https://forum.itascainternational.com/u/Akash)\ **Replies:** 3\ **Last updated:** [August 5, 2024, 7:19am UTC](https://forum.itascainternational.com/t/creating-elongated-voronoi-in-3dec/1605 "2024-08-05T07:19:53Z")
Hi, Is there any way to create an elongated Voronoi in 3DEC using the “block generate Voronoi” command? Thanks Akash --- ## [Unable to load a second .sav 3DEC crashes](https://forum.itascainternational.com/t/unable-to-load-a-second-sav-3dec-crashes/1604)
**Author:** [@Anorriz](https://forum.itascainternational.com/u/Anorriz)\ **Replies:** 5\ **Last updated:** [August 1, 2024, 8:20pm UTC](https://forum.itascainternational.com/t/unable-to-load-a-second-sav-3dec-crashes/1604 "2024-08-01T20:20:48Z")
Hello Itascans. We’re currently running some 3DEC models for a project and we would like to run two instances at once in one of our machines. The machine in question has 128 gb Ram and should be able to load and run two… --- ## [Bugs in Latest Itasca Software Version (24 July 2024)](https://forum.itascainternational.com/t/bugs-in-latest-itasca-software-version-24-july-2024/1599)
**Author:** [@Mahdi.S](https://forum.itascainternational.com/u/Mahdi.S)\ **Replies:** 5\ **Last updated:** [July 29, 2024, 9:58pm UTC](https://forum.itascainternational.com/t/bugs-in-latest-itasca-software-version-24-july-2024/1599 "2024-07-29T21:58:58Z")
I have updated my Itasca software to the latest version released on 24 July 2024, but I am encountering a few issues (in 3DEC): When loading a saved file, I intermittently receive the error message: ‘invalid vector sub… --- ## [How to extract the average unbalanced force ratio of blocks belonging to a certain group in the 3DEC 7.0](https://forum.itascainternational.com/t/how-to-extract-the-average-unbalanced-force-ratio-of-blocks-belonging-to-a-certain-group-in-the-3dec-7-0/1351)
**Author:** [@JLUJYP](https://forum.itascainternational.com/u/JLUJYP)\ **Replies:** 10\ **Last updated:** [July 18, 2024, 11:27am UTC](https://forum.itascainternational.com/t/how-to-extract-the-average-unbalanced-force-ratio-of-blocks-belonging-to-a-certain-group-in-the-3dec-7-0/1351 "2024-07-18T11:27:22Z")
Hi, I want to extract the average unbalanced force ratio of blocks belonging to a certain group in the 3DEC 7.0, not for all blocks. How can I design the FISH command flow for this? I know that the command block.mech.ra… --- ## [Preventing Block Penetration in Tunnel Stability Analysis using 3DEC](https://forum.itascainternational.com/t/preventing-block-penetration-in-tunnel-stability-analysis-using-3dec/1576)
**Author:** [@Mahdi.S](https://forum.itascainternational.com/u/Mahdi.S)\ **Replies:** 4\ **Last updated:** [July 15, 2024, 10:32pm UTC](https://forum.itascainternational.com/t/preventing-block-penetration-in-tunnel-stability-analysis-using-3dec/1576 "2024-07-15T22:32:52Z")
Hi everyone, I am simulating a plane strain model in 3DEC for tunnel stability analysis. In the following example, after roof failure, the unstable blocks move towards the tunnel floor and penetrate the floor elements. … --- ## [Simulation Time Comparison in 3DEC 7 and 3DEC 9](https://forum.itascainternational.com/t/simulation-time-comparison-in-3dec-7-and-3dec-9/1364)
**Author:** [@Akash](https://forum.itascainternational.com/u/Akash)\ **Replies:** 2\ **Last updated:** [July 7, 2024, 7:52pm UTC](https://forum.itascainternational.com/t/simulation-time-comparison-in-3dec-7-and-3dec-9/1364 "2024-07-07T19:52:07Z")
Hello, I ran two similar models in 3DEC 7 (158) and 3DEC 9 (166) with the same memory allocation (see the attached image). The overall behavior (i.e., stress-strain curve and failure pattern) looks similar. But the time… --- ## [Define a certain area by 3DEC](https://forum.itascainternational.com/t/define-a-certain-area-by-3dec/1548)
**Author:** [@huda](https://forum.itascainternational.com/u/huda)\ **Replies:** 0\ **Last updated:** [June 25, 2024, 9:46am UTC](https://forum.itascainternational.com/t/define-a-certain-area-by-3dec/1548 "2024-06-25T09:46:50Z")
how can i define a certain square surface area from arch to apply a square load on it? --- ## [Applied load on arch](https://forum.itascainternational.com/t/applied-load-on-arch/1543)
**Author:** [@huda](https://forum.itascainternational.com/u/huda)\ **Replies:** 2\ **Last updated:** [June 21, 2024, 4:57pm UTC](https://forum.itascainternational.com/t/applied-load-on-arch/1543 "2024-06-21T16:57:48Z")
if I want to apply square distributed load over certain area of the arch, do apply that by using stress or force . --- ## [Assigning Creep Models to Bonded Block Model (BBM) Contacts in 3DEC for Stand-Up Time Simulation](https://forum.itascainternational.com/t/assigning-creep-models-to-bonded-block-model-bbm-contacts-in-3dec-for-stand-up-time-simulation/1537)
**Author:** [@Mahdi.S](https://forum.itascainternational.com/u/Mahdi.S)\ **Replies:** 2\ **Last updated:** [June 19, 2024, 7:59pm UTC](https://forum.itascainternational.com/t/assigning-creep-models-to-bonded-block-model-bbm-contacts-in-3dec-for-stand-up-time-simulation/1537 "2024-06-19T19:59:56Z")
Hello Everyone, I am simulating the stand-up time of an underground excavation using the Bonded Block Model (BBM) method. The block sizes are modeled to represent the rock mass, and the contact stiffness and strength pa… --- ## [How to get volume discharge rate?](https://forum.itascainternational.com/t/how-to-get-volume-discharge-rate/1520)
**Author:** [@ShanLee](https://forum.itascainternational.com/u/ShanLee)\ **Replies:** 3\ **Last updated:** [June 17, 2024, 5:06pm UTC](https://forum.itascainternational.com/t/how-to-get-volume-discharge-rate/1520 "2024-06-17T17:06:20Z")
Hi everyone, I hope you’re all doing well. I’m currently working on a mechanical-hydraulic coupling simulation, and I’m trying to determine the volumetric discharge rate (m³/sec) at a specific contact. However, I notic… --- ## [Negative discharge rate test](https://forum.itascainternational.com/t/negative-discharge-rate-test/1495)
**Author:** [@ShanLee](https://forum.itascainternational.com/u/ShanLee)\ **Replies:** 4\ **Last updated:** [June 17, 2024, 1:56pm UTC](https://forum.itascainternational.com/t/negative-discharge-rate-test/1495 "2024-06-17T13:56:09Z")
Hi, everyone I try to use negative discharge at flowknots to simulate production well behavior in geothermal study. I notice that there are weird effective minimum principal stress distribution at production points so I… --- ## [Plotting DFN joints](https://forum.itascainternational.com/t/plotting-dfn-joints/1527)
**Author:** [@jhazzard](https://forum.itascainternational.com/u/jhazzard)\ **Replies:** 1\ **Last updated:** [June 17, 2024, 8:12am UTC](https://forum.itascainternational.com/t/plotting-dfn-joints/1527 "2024-06-17T08:12:56Z")
A tip: you can plot portions of 3DEC joints corresponding to DFN fractures by using the range for the joint plot item and selecting “DFN Distance” and selecting the desired DFN and some small distance. See screen captur… --- ## [Square load on arch](https://forum.itascainternational.com/t/square-load-on-arch/1519)
**Author:** [@huda](https://forum.itascainternational.com/u/huda)\ **Replies:** 1\ **Last updated:** [June 12, 2024, 10:30am UTC](https://forum.itascainternational.com/t/square-load-on-arch/1519 "2024-06-12T10:30:56Z")
why when I use point load this window appear “block face apply point-load: location must be given While processing line 5 of source GUI Console”. --- ## [DFN geometry vs domain extent](https://forum.itascainternational.com/t/dfn-geometry-vs-domain-extent/1488)
**Author:** [@xpnguyen](https://forum.itascainternational.com/u/xpnguyen)\ **Replies:** 3\ **Last updated:** [June 10, 2024, 6:41pm UTC](https://forum.itascainternational.com/t/dfn-geometry-vs-domain-extent/1488 "2024-06-10T18:41:19Z")
Hi, 3DEC7.00.133 crushes when the script below is executed. If I uncomment the 3rd line to change “x1extent”, then it works. Why is that ? model new \[x1extent = (84. - 10.) - 45.\] ; \[x1extent = -150.\] \[x2extent =… --- ## [Simulating Anisotropy Behavior of Coal](https://forum.itascainternational.com/t/simulating-anisotropy-behavior-of-coal/1498)
**Author:** [@Akash](https://forum.itascainternational.com/u/Akash)\ **Replies:** 1\ **Last updated:** [June 7, 2024, 12:44pm UTC](https://forum.itascainternational.com/t/simulating-anisotropy-behavior-of-coal/1498 "2024-06-07T12:44:11Z")
Hello, I am trying to perform a UCS simulation on coal with face cleats, butt cleats, and bedding planes in it. I created the model using the block-cut joint-set command with a statistical distribution for each joint ne… --- ## [Block results in 3DEC 7](https://forum.itascainternational.com/t/block-results-in-3dec-7/1462)
**Author:** [@xpnguyen](https://forum.itascainternational.com/u/xpnguyen)\ **Replies:** 3\ **Last updated:** [May 21, 2024, 12:36pm UTC](https://forum.itascainternational.com/t/block-results-in-3dec-7/1462 "2024-05-21T12:36:02Z")
Hi, is there anyway to export block results (displacement, stress) from 3DEC 7 model, so as to avoid restoring large .sav files upon post-treatment ? --- ## [Block field logic in 3DEC](https://forum.itascainternational.com/t/block-field-logic-in-3dec/1466)
**Author:** [@BillyF](https://forum.itascainternational.com/u/BillyF)\ **Replies:** 1\ **Last updated:** [May 20, 2024, 7:16pm UTC](https://forum.itascainternational.com/t/block-field-logic-in-3dec/1466 "2024-05-20T19:16:18Z")
Hi Itascans! I am using 3DEC v 7 and I wanted to use the block.field logic for extracting stress results. I got confused about the block.field.method setting. According to the manual, setting block.field.method.name() =… --- ## [Error message - hybrid bolt generation](https://forum.itascainternational.com/t/error-message-hybrid-bolt-generation/1415)
**Author:** [@Thiru28](https://forum.itascainternational.com/u/Thiru28)\ **Replies:** 2\ **Last updated:** [April 22, 2024, 10:40pm UTC](https://forum.itascainternational.com/t/error-message-hybrid-bolt-generation/1415 "2024-04-22T22:40:18Z")
Hi There, I am getting the following error message (see below screenshot) when generating hybrid bolt using the ‘sel hybrid create by-line’ command. Your advice and help to resolve this issue is much appreciated. --- ## [How to Optimize CPU Utilization in 3DEC 7.0 Numerical Simulations:](https://forum.itascainternational.com/t/how-to-optimize-cpu-utilization-in-3dec-7-0-numerical-simulations/1402)
**Author:** [@JLUJYP](https://forum.itascainternational.com/u/JLUJYP)\ **Replies:** 3\ **Last updated:** [April 8, 2024, 1:31pm UTC](https://forum.itascainternational.com/t/how-to-optimize-cpu-utilization-in-3dec-7-0-numerical-simulations/1402 "2024-04-08T13:31:16Z")
Hi, In the process of numerical simulation using 3DEC 7.0, I have utilized ‘program threads automatic’ to employ multithreading for faster simulation speed. However, the CPU utilization on my workstation is still below … --- ## [Question about reasonable steps of "model mech substep" command](https://forum.itascainternational.com/t/question-about-reasonable-steps-of-model-mech-substep-command/1389)
**Author:** [@ShanLee](https://forum.itascainternational.com/u/ShanLee)\ **Replies:** 2\ **Last updated:** [April 3, 2024, 6:13am UTC](https://forum.itascainternational.com/t/question-about-reasonable-steps-of-model-mech-substep-command/1389 "2024-04-03T06:13:16Z")
Hi everyone, In my project, I would like to do THM simulation with three sub-cycles. There are HM coupling, TH coupling and HM coupling with certain time ratio of three cycles. Firstly, I use 100 mechancial substep to d… --- ## [Dealing with relaxation in sequential excavation](https://forum.itascainternational.com/t/dealing-with-relaxation-in-sequential-excavation/1350)
**Author:** [@Phopthorn\_M](https://forum.itascainternational.com/u/Phopthorn_M)\ **Replies:** 6\ **Last updated:** [March 14, 2024, 12:18pm UTC](https://forum.itascainternational.com/t/dealing-with-relaxation-in-sequential-excavation/1350 "2024-03-14T12:18:08Z")
Hi guys, I would like to ask for suggestion about how to deal with vertical displacement (upward) from stress relaxation due to large scale block excavation (block delete and/or block excavate commands) in open pit mini… --- ## [How to connect the specified joints using joints id or joint group](https://forum.itascainternational.com/t/how-to-connect-the-specified-joints-using-joints-id-or-joint-group/1361)
**Author:** [@JLUJYP](https://forum.itascainternational.com/u/JLUJYP)\ **Replies:** 4\ **Last updated:** [March 14, 2024, 10:37am UTC](https://forum.itascainternational.com/t/how-to-connect-the-specified-joints-using-joints-id-or-joint-group/1361 "2024-03-14T10:37:30Z")
Hi, I established my 3DEC 7.0 model using Griddle2.0 and used the ‘block join on’ command to connect all the joints generated in Griddle. However, when I cut the model with DFN, I found that the connected joints generat… [Previous page](https://forum.itascainternational.com/c/3dec/6.md?page=1) [Next page](https://forum.itascainternational.com/c/3dec/6.md?page=3)