You may be getting an error because you are trying to use -1 in the ParseInteger formula. Because in the Java library Radix value is between 2 and 36.
In addition to this, if we look at your error, you are trying to assign the part that says N/A in your excel file as an integer. Trying to assign a string expression to an integer is getting an error. As a solution, you can delete the ones that say N/A. If your error persists, I'm here.
It used to be that calling a microflow from java wouldn’t trigger a break point. I can’t speak to that but here’s your fix:
Right click on your create integer action activity and “Set error handling...” to Custom without rollback. Draw a line coming out of the activity that has an endpoint set as “-1”.
Sorry, appears to be a known issue (https://forum.mendix.com/index3.html#/questions/11540474045336464). You’ll need to store an additional attribute that is a string. Run the parser on that then update the int based on the string attribute.