Send Document as Base64 - SOAP Integration

RE: Send Document as Base64 - SOAP Integration

erickjavidb860617 — Tue, 12 May 2026 16:20:43 GMT

Thank you for your response and for sharing your experience.

I’m going to try the database plugin approach first and evaluate how stable it is in our case. As you mentioned, I’ll make sure to clean up the temporary table after each execution.

If that approach becomes difficult to maintain or introduces performance issues, I’ll probably consider either a custom plugin or an intermediate service to handle the XML/Base64 transformation outside of Appian.

Thanks again for the suggestions.

RE: Send Document as Base64 - SOAP Integration

Stefan Helzle — Sat, 09 May 2026 09:22:21 GMT

This is a very well known issue. The limited support of separate Base64 conversion is the memory consumption and potential risk of system stability.

All my past experiences with SOAP and Appian have been painful. Mostly caused by the pure chaos of SOAP.

I think that the most direct approach ist that database plugin trick. Just make sure to clean that table after the call.

If this does not work, I suggest a custom plugin. A middleware or API gateway doing translation from/to JSON & XML might also be an alternative.