# CCTM emission process
**URL:** https://forum.cmascenter.org/t/cctm-emission-process/512
**Category:** SMOKE
**Created:** [February 12, 2019, 3:42pm UTC](https://forum.cmascenter.org/t/cctm-emission-process/512 "2019-02-12T15:42:41Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@ernesto.pinoc](https://forum.cmascenter.org/u/ernesto.pinoc)
#### Post date: [February 12, 2019, 3:42pm UTC](https://forum.cmascenter.org/t/cctm-emission-process/512/1 "2019-02-12T15:42:41Z")
Hello again:
This message is very confussed for me:
> > —\>\> WARNING in subroutine GET\_AERO\_EMIS on PE 000
> > Could not read PEC from EMIS\_1
> > M3WARN: DTBUF 12:07:30 Jan. 1, 2014 (2014001:120730)
> > Bad argument LAY1= 49
Wath´s the meaning of this??
This is the info about EMISS file
“EMIS\_1” opened as OLD:READ-ONLY
File name “/home/epino/CMAQ\_BLD\_NLHPC/data//SMOKE/enero\_febre2.ncf”
File type GRDDED3
Execution ID “???”
Grid name “GRIDOUT\_POLAR01\_”
Dimensions: 177 rows, 177 cols, 1 lays, 44 vbles
NetCDF ID: 786432 opened as READONLY
Starting date and time 2014001:000000 (0:00:00 Jan. 1, 2014)
Timestep 010000 (1:00:00 hh:mm:ss)
Maximum current record number 1777
Checking header data for file: EMIS\_1
As you can see, I only have one layer in the emission file processed in SMOKE4.5
The other message that confussed me is this:
```auto
Value for CTM_EMLAYS not defined; returning default: 49
Number of emission layers
Environment variable not set or empty ... Using default: 0
Number of Emissions Layers: 49
out of total Number of Model Layers: 49
Value for CTM_LTNG_NO: N returning FALSE
Aerosol Emissions Processing in Vertical diffusion ...
>>--->> WARNING in subroutine map_pmemis on PE 000
Could not find the following species in emissions file
PH2O
POC
POC
POC
POC
POC
```
Why does it say Number of emission layers Environment variable not set or empty … Using default: 0
How can I change this statement??
My simulation starts at 000000, so I don´t know why CCTM is looking for PEC emissions at 12:07:30. I don´t have PT3D emissions, I only work with surface emissions. PEC is in the emission file, and also CCTM reads it, as you can observe in this message in the log file
CHECKING COMPATABILITY BETWEEN INTERNAL SPECIES LIST AND EMISSIONS INPUTS
The following tables list the chemical species present
on each emission file or from each online emission source.
Gas and Aerosol Gridded Area Emissions: 44 Species
ALD2 ALDX BENZENE CH4
CO ETH ETHA ETOH
FORM HGNRVA HONO IOLE
ISOP MEOH NH3 NO
NO2 NVOL OLE PAL
PAR PCA PCL PEC
PFE PK PMC PMG
PMN PMOTHR PNA PNH4
PNO3 POC PSI PSO4
PTI SO2 SULF TERP
TOL UNK UNR XYL
Thanks
---
### Author:  [@Ben\_Murphy](https://forum.cmascenter.org/u/Ben_Murphy)
#### Post date: [March 7, 2019, 12:29pm UTC](https://forum.cmascenter.org/t/cctm-emission-process/512/2 "2019-03-07T12:29:41Z")
Hi Ernesto,
The problem is that we didn’t anticipate user’s having only surface emissions for this version of CMAQ. For CMAQv5.3, user’s are allowed to provide whatever they want. For now, go ahead and implement
setenv CTM\_EMLAYS 1
in your runscript. That should solve it.
Cheers