Applicable Systems
Wonderware System Platform
Symptoms
The Wonderware System Platform logs a script runtime error. A QuickScript or .NET script extension has thrown an unhandled exception during execution, halting the scripted logic.
Possible Causes
- Script references a deleted or renamed object that no longer exists in the Galaxy
- Type mismatch in the script, such as assigning a string to an integer variable without conversion
- Null reference when accessing a tag or object property that has not been initialized
Troubleshooting Steps
- Step 1: Review the error details in the SMC log for the exact line number and object name
The error message identifies the specific script, line number, and failing object reference - Step 2: Open the script in the IDE and navigate to the reported line
The code line contains the reference that caused the exception and the issue is visible - Step 3: Verify the referenced object exists in the Galaxy and is initialized before the script runs
The object exists and is initialized, or the script has been corrected to handle null cases
How to Reset
To reset: 1) Fix the script code per the error details. 2) Deploy the corrected script to the Galaxy. 3) Restart the application engine. 4) Verify the script executes without errors in the SMC log.
Source: Wonderware System Platform Manual, AVEVA (formerly Wonderware)
Category: SCADA