Literal written in POU MMS error. After Upgrading to 5.1 System.
After upgrading a control project from 4.1 to 5.1 FP4 Rev D getting this error while downloading. Same project i could able to download without any error in 4.1 as well in 5.0 Sp2 system.
I had this problem as well. The problem was there was a parameter from a control module directly connected to a input of a funtion block. This didn't work. I had to create a variable and connect that to the function block and connect the parameter to the variable:
Parameter --> control module --> function block
Parameter --> control module --> variable --> function block