# ERROR: Invalid Negative emission rate -Infinity

**URL:** <https://forum.cmascenter.org/t/error-invalid-negative-emission-rate-infinity/4001>\
**Category:** Run Time Errors and Issues\
**Tags:** cmaq, emissions\
**Created:** [March 23, 2023, 4:09pm UTC](https://forum.cmascenter.org/t/error-invalid-negative-emission-rate-infinity/4001 "2023-03-23T16:09:53Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![nibawer](https://avatars.discourse-cdn.com/v4/letter/n/ecccb3/32.png) [@nibawer](https://forum.cmascenter.org/u/nibawer)\
**Post date:** [April 28, 2023, 3:36pm UTC](https://forum.cmascenter.org/t/error-invalid-negative-emission-rate-infinity/4001/6 "2023-04-28T15:36:26Z")

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Sorry for reply late. Great thanks to all of you. I have tried m3stat and it failed. So it’s the problem of my python script. I think @barronh 's suggestion is right, and I will try it in the future. And I also suggest the python-ioapi method in this url [netCDF Wrapper Library for Gridded I/O API-like files - PYTHON - CMAS CENTER FORUM](https://forum.cmascenter.org/t/netcdf-wrapper-library-for-gridded-i-o-api-like-files/2778), to whom may use python to create the ioapi emission file.

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