# CRACMM2 ICON,BCON Error

**URL:** <https://forum.cmascenter.org/t/cracmm2-icon-bcon-error/6175>\
**Category:** CMAQ\
**Created:** [March 31, 2026, 8:47am UTC](https://forum.cmascenter.org/t/cracmm2-icon-bcon-error/6175 "2026-03-31T08:47:53Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Heomin](https://avatars.discourse-cdn.com/v4/letter/h/9fc348/32.png) [@Heomin](https://forum.cmascenter.org/u/Heomin)\
**Post date:** [March 31, 2026, 8:47am UTC](https://forum.cmascenter.org/t/cracmm2-icon-bcon-error/6175/1 "2026-03-31T08:47:54Z")

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Hello,

I am trying to run a CMAQ simulation using the CRACMM2 mechanism.

Before starting the simulation, I attempted to generate the ICON and BCON input files. To do this, I used `map2mech` to convert existing Hemispheric CMAQ results based on the CB06 mechanism to CRACMM2. However, when I run the ICON and BCON programs, I encounter errors.

I have attached the error log below. I would greatly appreciate it if you could take a look and suggest a possible solution.

Thank you.  
Min

[LOG.txt](https://forum.cmascenter.org/uploads/short-url/tXpDcrM729HTgSGLsgK3XZxBq57.txt) (60.7 KB)

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**Author:** ![lizadams](https://avatars.discourse-cdn.com/v4/letter/l/49beb7/32.png) [@lizadams](https://forum.cmascenter.org/u/lizadams)\
**Post date:** [March 31, 2026, 1:13pm UTC](https://forum.cmascenter.org/t/cracmm2-icon-bcon-error/6175/2 "2026-03-31T13:13:01Z")

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It looks like you may be trying to overwrite an existing ICON file.

setenv INIT\_CONC\_1 /home2/heo/MODEL/CMAQ/V5.5/data/2022\_DA\_d01/CRACMM/ICON/ICON.DA.20220426 -v

```
 >>> WARNING in subroutine CHKFIL3 <<<
 Inconsistent file attribute NVARS for file INIT_CONC_1
 Value from file: 254
 Value from caller: 156

 >>> WARNING in subroutine CHKFIL3 <<<
 Inconsistent variable list for file INIT_CONC_1
 Value from file: ZH
 Value from caller: TA

 >>> WARNING in subroutine CHKFIL3 <<<
 Inconsistent variable list for file INIT_CONC_1
 Value from file: ZF
 Value from caller: RH

 >>> WARNING in subroutine CHKFIL3 <<<
 Inconsistent variable list for file INIT_CONC_1
 Value from file: NO2
 Value from caller: W_VEL

 >>> WARNING in subroutine CHKFIL3 <<<
 Inconsistent variable list for file INIT_CONC_1
 Value from file: NO
 Value from caller: NO2

```

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<div class="post-metadata">

**Author:** ![Heomin](https://avatars.discourse-cdn.com/v4/letter/h/9fc348/32.png) [@Heomin](https://forum.cmascenter.org/u/Heomin)\
**Post date:** [March 31, 2026, 2:03pm UTC](https://forum.cmascenter.org/t/cracmm2-icon-bcon-error/6175/3 "2026-03-31T14:03:58Z")

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The issue was resolved after deleting the original file. Thank you.

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**Author:** ![system](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/1X/9a72c78e529465c3f1053af404e3033b0875428c.png) [@system](https://forum.cmascenter.org/u/system)\
**Post date:** [April 7, 2026, 2:04pm UTC](https://forum.cmascenter.org/t/cracmm2-icon-bcon-error/6175/4 "2026-04-07T14:04:19Z")

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