Function module call error

What causes this issue?

A function module was called with an invalid interface parameter value.
All parameters must have valid values for the function module to run.
This invalid interface parameter value can be :
Generally invalid for this parameter.
Only invalid for this parameter in the current program context (other
parameter values, calling program, f unction to be performed, system
settings, etc.).

System Response

The function module is cancelled, and raises an exception. Further
consequences depend on the handling of the exception in the calling
program. Usually, the current action is cancelled and this error message
is sent to the user.

How to fix this error?

This error message is usually only sent if the program cannot identify
the invalid parameter uniquely (for example if several related
parameters are incompatible). Contact SAP.
If you want to try to solve the problem yourself :
Find out in the debugger, which value, parameter and function module
caused the error message, and whether this value is generally invalid
for this parameter or only invalid for this parameter in the current
program context.
The function module documentation will usually tell you which values are
valid in which program context. However, parameters are often just
passed on through through program levels, so that this parameter may
only be described in detail in the documentation of a higher-level
function module or class.
Determine a valid value for the parameter and ensure that it is passed
in future.
If you cannot resolve the problem, contact SAP.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.