Is it possible to perform a MetaMatrix relate query using relateSource only in criteria?

Issue

• When executing this query the following error is returned:

  Exception running query:  The number of result rows has exceeded the maximum result rows '100,001'
  

• We do have max rows set. Only 1 relationship record matches the criteria, but we're somehow getting maxrows. 

• We need to essentially 'wildcard' the target and I'm wondering if the syntax is correct?