Corrected from:
Response of the new version:
The value of the ENUM variable declared as VAR_IN_OUT is displayed correctly in the trace even if the cursor is shown.
When displaying a cursor (menu command 'Trace' > 'Cursor') on a trace tab, the error message appears:
Object reference not set to an instance of an object
When does the behaviour occur?
The error message occurs when an ENUM variable declared as VAR_IN_OUT is used in a trace.
Which products are affected?
PLC Designer from 3.20
Short-term measures:
Do not use an ENUM variable declared as VAR_IN_OUT in a trace.
Evaluation/Recommendations:
With occurrence of this function restriction the PLC Designer project is neither corrupt nor damaged.
Automatic Translation
