Hi Kael,
Unfortunately there isn't really an error number somewhere. The log just has something like this:
The following were not updated due to errors:
The following projects were referred to by the given change packages. They
cannot be found in the list of registered projects on the server, or you do not
have permission to access these projects, or the variant Fieldglass-2015.21
of the project could not be found and variant creation was not requested.
All entries referring to these projects will be ignored.
/Integration/src/java/insite/web/integration/translator/project.pj 523098:6
The command was run using explicit subproject propagation. It may be possible
to resolve this problem by executing the command again, specifying that
subproject operations should be propagated implicitly rather than explicitly.