In Cloud Workflow, I am having an issue using an input parameter to determine how many rows a lookup should pull back.  For this,  I have created an input token and tested each of the types checked below.

I then have updated Rows to Return on the lookup to use that input parameter.

Finally, I have the parent Workflow passing in a numerical value for that input parameter.

However when the child workflow attempts to run the query with input parameter limiting the rows to return, it returns an error.

Does anyone know what format the input parameter should be for this activity to accept the number it is passing?