Re: I have done tabmerging, and while iam keying inputs and press enter the fist tab disappearing .Can any one suggest in this regard

This appears to be transaction MM01 which should have correct overwrite entries configured, so first make sure you have those maintained according to note 1999747

Also, having required fields along with tab merging usually causes problems so this may also play a role here. In your screen shot, the material group and description are required and on the second screen these are not showing up so this may be the tab caching failing due to missing required fields. I can't see the tab caching indicator in the screen shots to be sure if this is happening.

Edit: I see that Kranthi beat me while I was typing

Message was edited by: Tamas Hoznek