# Can I run CMAQ-ISAMv5.02 with saprc99

**URL:** <https://forum.cmascenter.org/t/can-i-run-cmaq-isamv5-02-with-saprc99/408>\
**Category:** CMAQ-ISAM\
**Created:** [November 13, 2018, 6:41am UTC](https://forum.cmascenter.org/t/can-i-run-cmaq-isamv5-02-with-saprc99/408 "2018-11-13T06:41:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![shenjuanyong](https://avatars.discourse-cdn.com/v4/letter/s/2acd7d/32.png) [@shenjuanyong](https://forum.cmascenter.org/u/shenjuanyong)\
**Post date:** [November 13, 2018, 6:41am UTC](https://forum.cmascenter.org/t/can-i-run-cmaq-isamv5-02-with-saprc99/408/1 "2018-11-13T06:41:42Z")

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The CMAQ5.0.2-ISAM downloaded from CMAS does not include “ebi\_saprc99” in the “models/CCTM\_ISAM/gas” folder. But I want to run isam with saprc99 instead of cb05. SO can I run ism with saprc99?

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**Author:** ![sergey](https://avatars.discourse-cdn.com/v4/letter/s/9fc348/32.png) [@sergey](https://forum.cmascenter.org/u/sergey)\
**Post date:** [November 13, 2018, 6:44pm UTC](https://forum.cmascenter.org/t/can-i-run-cmaq-isamv5-02-with-saprc99/408/2 "2018-11-13T18:44:12Z")

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sapc99 mechanism was not supported for ISAM in the 5.0.2 release of the model. The next release will have more mechanism flexibility.

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**Author:** ![shenjuanyong](https://avatars.discourse-cdn.com/v4/letter/s/2acd7d/32.png) [@shenjuanyong](https://forum.cmascenter.org/u/shenjuanyong)\
**Post date:** [November 15, 2018, 12:52pm UTC](https://forum.cmascenter.org/t/can-i-run-cmaq-isamv5-02-with-saprc99/408/3 "2018-11-15T12:52:06Z")

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Thank you for your response. Then when the next isam release will be distributed?