# NetCDF: Index exceeds dimension bound

**URL:** https://forum.cmascenter.org/t/netcdf-index-exceeds-dimension-bound/2006
**Category:** CMAQ
**Created:** [January 12, 2021, 9:25pm UTC](https://forum.cmascenter.org/t/netcdf-index-exceeds-dimension-bound/2006 "2021-01-12T21:25:34Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![qluo](https://avatars.discourse-cdn.com/v4/letter/q/90ced4/32.png) [@qluo](https://forum.cmascenter.org/u/qluo)
#### Post date: [January 12, 2021, 9:25pm UTC](https://forum.cmascenter.org/t/netcdf-index-exceeds-dimension-bound/2006/1 "2021-01-12T21:25:34Z")

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Hi,

I met an index issue when running CMAQ:  
 ![image](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/2X/8/8c50549e44ae309b92ce90aea66a8cc2b25a4c19.png)

There is no error in any CTM\_LOG files and they all stopped at:

 ![image](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/2X/a/ad08612cf529f62315e94eda81d0906090527eba.png) .

I can run the model for January so there should not be any issue with the model compilation. The simulation started at 12/15/2015. I checked the dimensions of the icbc files and they look normal to me. I attached their header files here in case that I missed any thing ([BCON\_v53\_2015\_12US1\_459X299\_regrid\_20151215\_header.txt](https://forum.cmascenter.org/uploads/short-url/AdNgftIoJsXkJ0qOasPhRQTap5Q.txt) (63.3 KB) [emis\_mole\_all\_20151215\_12US1\_withbeis\_2015fd\_cb6\_15j\_header.txt](https://forum.cmascenter.org/uploads/short-url/mhHlC0opgMp2U0bDyMvkddpVlTK.txt) (21.1 KB) [ICON\_v53\_2015\_12US1\_459X299\_regrid\_20151214\_header.txt](https://forum.cmascenter.org/uploads/short-url/cJhyPjNGqFlTv9CqE282sL1FYKP.txt) (64.1 KB) ). The met data was downloaded from cmas data warehouse and using 12US1.

I would so appreciate it if anyone can take a look at these files and let me know what else I should check to locate the real issues.

Thanks,  
Qian

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### Author: ![cgnolte](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.cmascenter.org/cgnolte/32/53_2.png) [@cgnolte](https://forum.cmascenter.org/u/cgnolte)
#### Post date: [January 15, 2021, 2:16am UTC](https://forum.cmascenter.org/t/netcdf-index-exceeds-dimension-bound/2006/2 "2021-01-15T02:16:39Z")

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This appears to be CMAQv5.3. Have you tried CMAQv5.3.2?

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### Author: ![qluo](https://avatars.discourse-cdn.com/v4/letter/q/90ced4/32.png) [@qluo](https://forum.cmascenter.org/u/qluo)
#### Post date: [January 15, 2021, 2:54pm UTC](https://forum.cmascenter.org/t/netcdf-index-exceeds-dimension-bound/2006/3 "2021-01-15T14:54:47Z")

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Hi @cgnolte ,

I did run CMAQ 5.3.2 but all data were stored under the folder for CMAQ5.3. The issue was solved after I changed the icon file so it should be caused by it. I generated ICON/BCON files using the tools with CMAQ5.3.

Thanks,  
Qian