Error related to BDY_CONC_1

CMAQ
1

Hello All,

I used the CMAQ v5.5 for running the CCTM script which is in the attachment.

I got the following error which the log file is in the attachment too:

—>> WARNING in subroutine RDTFLAG
Time step error for file: BNDY_CONC_1
M3WARN: DTBUF 8:00:00 Feb. 14, 2025 (2025045:080000)

 *** ERROR ABORT in subroutine retrieve_boundar on PE 000
 Could not read BNDY_CONC_1                              file

PM3EXIT: DTBUF 8:00:00 Feb. 14, 2025
Date and time 8:00:00 Feb. 14, 2025 (2025045:080000)

In the BCON file I have:

STIME = 60000 ;
TSTEP = 60000

Since in the MCIP, EMISSIONS and CGRID files I have:

STIME = 80000 ;
TSTEP = 10000

I’m not sure if this difference causes that error or not. I will appreciate if I get any suggestions.

run_cctm_airpact5.csh (37.7 KB)
CTM_LOG.txt (17.3 KB)

2

@amin,

Thanks for pointing this out. Your case quite nicely demonstrates the inability of recent versions of CCTM (v5.3+) to read and interpolate chemical boundary files with start dates and times nonaligned from the start date and time of the simulation.

Unfortunately, you’ll have to do some pre-processing on your chemical boundary file to align the times by interpolating your data to the times in your MET dataset.

I suggest using the I/O API tool M3INTERP to do this interpolation. After that the model should work as intended.

Thanks, again, for letting us know and we will release a patch to fix this bug in a future model release.

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3

Thank you so much Fahim.

I ran the m3interp and created the STIME = 80000, then reran the cctm. This time, I did not get the previous error related to the BCON but I got another error. So it seems that the error related to the BCON was solved. I will create a new topic for the new error if it was necessary.

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