When users attempt to publish a process model, they are shown the following validation error:
There was an error in an expression in null at null: null
No error is produced in the logs.
The process model is referencing a deleted object within an expression. The most common root cause is a swim lane pointing to a deleted process variable, deleted constant, or deleted group.
Map the process model object to an existing item (e.g. fix the assignment lane).
This article applies to Appian 7.8 and later.
Last Reviewed: February 2017
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