KB-1484 HTTP 500 error when using Appian integration object to call an Appian Web API

Symptoms

When calling an Appian Web API using an Appian integration object, the response is a HTTP 500 error.

Cause

This can happen when the request to the Web API is malformed or contains invalid inputs.

Action

Check to make sure that all parameters being passed are valid, and that the request body is property cast using the a!toJson() function.

Affected Versions

This article applies to Appian 17.2 and later.

Last Reviewed: January 2018