RFC call failed at Receiver channel

Hi All,

We have a RFC to check the validity of WBS. RFC works fine in ECC. Import parameter is 11 characters (WBS). If we trigger the RFC from PI with 11 characters WBS, getting an error as shown below.

If we try with 8 digit WBS, RFC is getting triggered and correct output is coming. There are some WBS with length 11 digits. So in that case also this needs to be triggered. But getting the error as above. External debugger in ECC is also not working in this case.

Can anyone tell us why 'To many digits' error is coming & it fails at Receiver channel ?

I would appreciate every comment on this.