[SOLVED] Error was because of maximum entry length limit in database. After modification of one line in module.php file (checking entry length) and change of types of two columns in database from TEXT to MEDUIMTEXT problem stoped for now.

So it WAS a module problem (limit) in fact.

Thanks for pointing this out. We will check it.

Hello, thanks for info.
But there is no module.php file in the grid portfolio module!!!

 After modification of one line in module.php

What did you cahnge and in which module?
Thanks Peter