Transaction form allocation for transaction &1 not found

What causes this issue?

The system was unable to interprete the
<DS:DE.TV_GFORM>transaction form</> of the transaction. The allocation
is done in a system table containing allocations for the transactions
which can be valued in Risk Management.

System Response

Because the system was unable to prepare the transaction for valuation,
the transaction is not valued.

How to fix this error?

Check whether the transaction is a transaction which can be valued in
SAP Risk Management. If the transaction can be valued, the corresponding
entry is missing in the system table and needs to be added by SAP.

Error message extract from SAP system. Copyright SAP SE.