# I want to change my GRIDDESK

**URL:** <https://forum.cmascenter.org/t/i-want-to-change-my-griddesk/3058>\
**Category:** Run Time Errors and Issues\
**Created:** [February 23, 2022, 10:47pm UTC](https://forum.cmascenter.org/t/i-want-to-change-my-griddesk/3058 "2022-02-23T22:47:15Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![kkkghs0828](https://avatars.discourse-cdn.com/v4/letter/k/ce7236/32.png) [@kkkghs0828](https://forum.cmascenter.org/u/kkkghs0828)\
**Post date:** [February 23, 2022, 10:47pm UTC](https://forum.cmascenter.org/t/i-want-to-change-my-griddesk/3058/1 "2022-02-23T22:47:15Z")

</div>

I changed my GRIDDESC but CMAQ cannot read data at all.  
 ![image](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/2X/2/220075182b3eca3e166d6c895f74cbd4ef0f5d62.png)  
Met and GRID data are working well.

---

<div class="post-metadata">

**Author:** ![cjcoats](https://avatars.discourse-cdn.com/v4/letter/c/ac8455/32.png) [@cjcoats](https://forum.cmascenter.org/u/cjcoats)\
**Post date:** [February 23, 2022, 11:07pm UTC](https://forum.cmascenter.org/t/i-want-to-change-my-griddesk/3058/2 "2022-02-23T23:07:36Z")

</div>

I suspect that the way you’ve put the grid description into the GRIDDESC file does not match the units or conventions for grid descriptions. See  
[https://cjcoats.github.io/ioapi/GRIDS.html#horiz](https://cjcoats.github.io/ioapi/GRIDS.html#horiz)  
or  
[https://www.cmascenter.org/ioapi/documentation/all\_versions/html/GRIDS.html#horiz](https://www.cmascenter.org/ioapi/documentation/all_versions/html/GRIDS.html#horiz)  
noting that the correct units are either MKS-compliant distances (i.e., meters, not kilometers) or ISO Standard 6709 compliant latitudes and longitudes (i.e., signed degrees, with -90 \<= LON \<= LON, -180 \< LAT \<= 180.

Unfortunately, the error-logging in “subhfile.F” is so screwed up that you can’t tell which item in the `GRIDDESC` file is the problem. Error logging should **always** be sufficiently detailed to diagnose such things.