"Assign variable" block has error.

I made a custom template that uses "assign variable" blocks.
But, when I use this template to build strategies, this error message comes.


=====================================================
Exception in backtest: Cannot create strategy from XML! Error: Block 'AssignVariable' - Param with name '#ComputedFrom#' was not found! - 0.1590
10:25:23.490 - GRID: Stopping build, job failures (exceptions) exceeded 70%!

=====================================================



Please check this problem.
Thank you.


Malim