BEx: ABEND RS_EXCEPTION (000): Subfield access

Hi Experts,

we receive an Exception when we execute an BEx WebTemplate (after variables screen). The exception is caused by one of the queries in the WebTemplate. In that specific Query we get the value of an characteristic via Customer Exit. Interestingly, the exception came after the Upgrade von BW 7.0 to BW 7.4.

Exception:

cmod coding for that variable:

Regards,

Stephan