SYMPTOM:
As described in KB article KB16688: How to execute multiple events using URL API in MicroStrategy Web and Web Universal 9.x, a URL can be constructed to two events in sequence which might be executing a document and setting a specific panel or to login and execute a document. For sample use cases for URL links with multiple events, refer to the following technical notes:
In some cases, users may encounter the following error message when running a URL with multiple events:

Unexpected execution status : 16
&evtwait=true