# Error in using block insitu command in UDEC to model topography stress including overburden **URL:** \ **Category:** UDEC\ **Tags:** faq\ **Created:** [December 9, 2022, 4:29pm UTC](https://forum.itascainternational.com/t/error-in-using-block-insitu-command-in-udec-to-model-topography-stress-including-overburden/859 "2022-12-09T16:29:00Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Binu](https://avatars.discourse-cdn.com/v4/letter/b/3ab097/32.png) [@Binu](https://forum.itascainternational.com/u/Binu)\ **Post date:** [December 9, 2022, 4:29pm UTC](https://forum.itascainternational.com/t/error-in-using-block-insitu-command-in-udec-to-model-topography-stress-including-overburden/859/1 "2022-12-09T16:29:01Z")
I am getting error in generating initial stress field in a UDEC model using the _“block insitu stress-topography”_ -command. While using command I got error block insitu stress-topography kox 1.0 koz 1.0 koy 1 yup overburden-yy 1300 ![error](https://canada1.discourse-cdn.com/flex031/uploads/itasca/original/1X/7bf361617ecfed549412f8e07c122bdbdd11a1cc.png) ---
**Author:** ![markus](https://yyz1.discourse-cdn.com/flex031/user_avatar/forum.itascainternational.com/markus/32/288_2.png) [@markus](https://forum.itascainternational.com/u/markus)\ **Post date:** [December 9, 2022, 4:48pm UTC](https://forum.itascainternational.com/t/error-in-using-block-insitu-command-in-udec-to-model-topography-stress-including-overburden/859/2 "2022-12-09T16:48:15Z")
Just a guess, but maybe the definition of stress ratios (kox etc.) is incompatible with the specific assignment of stress directions (overburden-yy). I would suspect that you either define a overburden stress (without xx,yy etc) and the components follow from your ratios or you don’t specify ratios and explicitly set the overburden-xx/yy/zz values and UDEC calculates the ratios itself. But again, it’s just a guess. ---
**Author:** ![Binu](https://avatars.discourse-cdn.com/v4/letter/b/3ab097/32.png) [@Binu](https://forum.itascainternational.com/u/Binu)\ **Post date:** [December 10, 2022, 12:47am UTC](https://forum.itascainternational.com/t/error-in-using-block-insitu-command-in-udec-to-model-topography-stress-including-overburden/859/3 "2022-12-10T00:47:45Z")
> [@Binu](#): > > block insitu stress-topography kox 1.0 koz 1.0 koy 1 yup overburden-yy 1300 when I used overburden-zz command its run. But results is not correct. As udec is 2 D and z is out plane direction so its not correct to used overburden in z direction when y is vertical direction. ---
**Author:** ![Binu](https://avatars.discourse-cdn.com/v4/letter/b/3ab097/32.png) [@Binu](https://forum.itascainternational.com/u/Binu)\ **Post date:** [December 10, 2022, 12:48am UTC](https://forum.itascainternational.com/t/error-in-using-block-insitu-command-in-udec-to-model-topography-stress-including-overburden/859/4 "2022-12-10T00:48:05Z")
when I used overburden-zz command its run. But results is not correct. As udec is 2 D and z is out plane direction so its not correct to used overburden in z direction when y is vertical direction. ---
**Author:** ![udecsupport](https://avatars.discourse-cdn.com/v4/letter/u/e9c0ed/32.png) [@udecsupport](https://forum.itascainternational.com/u/udecsupport)\ **Post date:** [December 14, 2022, 2:19pm UTC](https://forum.itascainternational.com/t/error-in-using-block-insitu-command-in-udec-to-model-topography-stress-including-overburden/859/5 "2022-12-14T14:19:46Z")
The error was caused by a bug in UDEC 7.0. This has been fixed and an update is available from [Itascacg.com](http://Itascacg.com) ---
**Author:** ![Binu](https://avatars.discourse-cdn.com/v4/letter/b/3ab097/32.png) [@Binu](https://forum.itascainternational.com/u/Binu)\ **Post date:** [December 17, 2022, 2:20am UTC](https://forum.itascainternational.com/t/error-in-using-block-insitu-command-in-udec-to-model-topography-stress-including-overburden/859/6 "2022-12-17T02:20:58Z")
Thank you support team for fixing bug. It is working now.