SAP Integration throught RFC: Input Parameters Truncated

Hi,

we are using the function a!sapInvoke to integrate with SAP throught RFC. Weeks ago, the integration worked  and we received the results expected.

For development requirements, external system add some parameters and change the lenght of some text fields (from 20 to 25).

After those changes, we receive errors on specific fields, but the return message gives a value that doesn't match the one sent.

So, we check with external system and the problem is on all fields.

For example, if we pass the parameter of the below images, external system receive as key1 the value "ABC/AAA/456789001/20ABC". It seems it takes the first 20th char and then take the others from key2.

ICould you help us to understand the nature of the problem, please?

Thanks in advance.

Regards