I was encountering this error in a FIM Workflow with an If-Else statement that was using a Declarative Rule Condition where the declarative rule condition name was the “condition name”.

The fix was to add something like the following in the code behind:

private void ccManagerEmailFound(object sender, ConditionalEventArgs e)

{

e.Result = bManagerEmailFound;

}

Then, change the If-Else to a Code Condition and select the new code condition just added.