wts_load.vbs should handle exceptions internally and nicely report back its failure, verify that nrpe agent handles crashed subprocesses at the same time for correct feedback to the nrpe client.
The exception portion is "solved" by the fact that the vbs script is gone. We still need to check how crashing subprocesses are handled though.
Then main nrpe_nt service handles errors correctly, need to verify that that the wts_load plugin does it to.
The error handling and output looks good in the wts_load plugin.