# \*.cov and \*.ext files

**URL:** <https://forum.certara.com/t/cov-and-ext-files/3464>\
**Category:** NLME-NONMEM model comparisons\
**Created:** [December 27, 2019, 2:52pm UTC](https://forum.certara.com/t/cov-and-ext-files/3464 "2019-12-27T14:52:13Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![youssefmousa](https://avatars.discourse-cdn.com/v4/letter/y/ccd318/32.png) [@youssefmousa](https://forum.certara.com/u/youssefmousa)\
**Post date:** [December 27, 2019, 2:52pm UTC](https://forum.certara.com/t/cov-and-ext-files/3464/1 "2019-12-27T14:52:13Z")

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Hi,

How I can get the \*.cov and \*.ext files in NONMEM using Phoenix? I need this kind of data for BE calculations.

Best

Youssef

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**Author:** ![SimonDavis](https://avatars.discourse-cdn.com/v4/letter/s/d9b06d/32.png) [@SimonDavis](https://forum.certara.com/u/SimonDavis)\
**Post date:** [December 30, 2019, 5:55am UTC](https://forum.certara.com/t/cov-and-ext-files/3464/2 "2019-12-30T05:55:56Z")

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Are you talking about running NONMEM form within Phoenix and being able to see these as worksheets after the run?

I think you need to request them as tables in the NM control stream.

if that doen’t help perhaps you can post your code/project. Thanks, Simon

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**Author:** ![Samer\_Mouksassi](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@Samer\_Mouksassi](https://forum.certara.com/u/Samer_Mouksassi)\
**Post date:** [December 31, 2019, 6:47pm UTC](https://forum.certara.com/t/cov-and-ext-files/3464/3 "2019-12-31T18:47:51Z")

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these are text files generated to disk whenever you run nonmem. you can always go to the folder where the model was run to get these files