# Error occurs when using SameDiff lstmLayer to train

**URL:** <https://community.konduit.ai/t/error-occurs-when-using-samediff-lstmlayer-to-train/94>\
**Category:** SameDiff\
**Created:** [January 23, 2020, 3:33am UTC](https://community.konduit.ai/t/error-occurs-when-using-samediff-lstmlayer-to-train/94 "2020-01-23T03:33:23Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![AllenWGX](https://yyz1.discourse-cdn.com/flex035/user_avatar/community.konduit.ai/allenwgx/32/35_2.png) [@AllenWGX](https://community.konduit.ai/u/AllenWGX)\
**Post date:** [January 23, 2020, 3:33am UTC](https://community.konduit.ai/t/error-occurs-when-using-samediff-lstmlayer-to-train/94/1 "2020-01-23T03:33:23Z")

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hi, I’m using SameDiff lstmLayer to modeling a sequence predict problem. I wrote two examples, one program is testing/predicting and the other is training. The testing example runs successfully and I got the final result. But the training example threw “not implemented” exception. I want to know if SameDiff lstmLayer has not implemented difference calculation yet ? BTW, I use 1.0.0-beta6 version.