CONVT_NOT_SUPPORTED is an ABAP runtime error which you may come across when using or developing within an SAP system. See below for the standard details explaining what it means and how you can avoid or fix this runtime error.
Short Dump Classification: A - ABAP Programming Error
You can view further information about a runtme error by using transaction code ST22 which will show you this and all runtime erros that have happen in your SAP system.
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Please see abap error for more details about the possible cause of this runtime error and how it could be avoided.
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Illegal type or length combination in MOVE EXACT.
Please see abap error for more details about the possible cause of this runtime error and how it could be avoided.
The MOVE EXACT from <runtime parameter> (type <runtime parameter>) to <runtime parameter> (type <runtime parameter>) is illegal. (If
the types were known at compilation time, a syntax error would occur,
regardless of the content of <runtime parameter>).
As well as the internal types of the two fields, the lengths of the
fields also have to comply with certain rules (see keyword
documentation for MOVE EXACT).
Please see abap error for more details about the possible cause of this runtime error and how it could be avoided.