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This article applies to: ML v7

Unable to cast object of type System.String to type System.Collections.ArrayList.


Symptoms
When editing products you get an error message "Unable to cast object of type 'System.String' to type 'System.Collections.ArrayList'."

Cause
The issue was caused by a caching name conflict.

Solution
There are several solutions.

1. Turn caching off while working in the admin section and then turn it back on when you are finished.
2. Limit the editing of products to either Products -> Product Manager or Products -> Edit Products (don't use both).
3. Upgrade to 7.0.2.5 or higher where the issue has already been resolved.