# CMAQ5.3.1 CCTM run error “ Error interpolating variable SLTYP”

**URL:** <https://forum.cmascenter.org/t/cmaq5-3-1-cctm-run-error-error-interpolating-variable-sltyp/1453>\
**Category:** Run Time Errors and Issues\
**Created:** [April 27, 2020, 9:22am UTC](https://forum.cmascenter.org/t/cmaq5-3-1-cctm-run-error-error-interpolating-variable-sltyp/1453 "2020-04-27T09:22:26Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![CN\_CODER](https://avatars.discourse-cdn.com/v4/letter/c/f08c70/32.png) [@CN\_CODER](https://forum.cmascenter.org/u/CN_CODER)\
**Post date:** [April 27, 2020, 9:22am UTC](https://forum.cmascenter.org/t/cmaq5-3-1-cctm-run-error-error-interpolating-variable-sltyp/1453/1 "2020-04-27T09:22:26Z")

</div>

The following error occurred when I ran the CCTM script

```
 CTM_OCEAN_CHEM set to FALSE. Open ocean and surf zone
 fractions will be set to 0. There will be no oceanic
 halogen-mediated loss of ozone or sea spray aerosol emissions.
 Requested date & time: 2020088:120000
 File starting date & time: 2020088:130000
 File time step: 010000
 
 >>--->> WARNING in subroutine RDTFLAG
 Time step error for file: MET_CRO_2D
 M3WARN: DTBUF 12:00:00 March 28, 2020(2020088:120000)
 
 >>--->> WARNING in subroutine XTRACT3
 Time step not available for file: MET_CRO_2D
 M3WARN: DTBUF 12:00:00 March 28, 2020(2020088:120000)

 *** ERROR ABORT in subroutine retrieve_time_de on PE 000
  Error interpolating variable SLTYP from MET_CRO_2D
  PM3EXIT: date&time specified as 0
  Date&time specified as 0

```

What caused it?

---

<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:** [April 27, 2020, 10:18am UTC](https://forum.cmascenter.org/t/cmaq5-3-1-cctm-run-error-error-interpolating-variable-sltyp/1453/2 "2020-04-27T10:18:06Z")

</div>

When the `MET_CRO_2D` file was opened there will have been a log-message indicating the starting date  
&time, timestep, and duration for this file. Is this requested date&time consistent with the file, and is that consistent with your run specifications?

---

<div class="post-metadata">

**Author:** ![CN\_CODER](https://avatars.discourse-cdn.com/v4/letter/c/f08c70/32.png) [@CN\_CODER](https://forum.cmascenter.org/u/CN_CODER)\
**Post date:** [April 27, 2020, 10:21am UTC](https://forum.cmascenter.org/t/cmaq5-3-1-cctm-run-error-error-interpolating-variable-sltyp/1453/3 "2020-04-27T10:21:29Z")

</div>

thanks ，STTIME set error

set STTIME = 130000 #\> beginning GMT time (HHMMSS)

set NSTEPS = 060000 #\> time duration (HHMMSS) for this run

set TSTEP = 010000 #\> output time step interval (HHMMSS)

---

<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:** [April 27, 2020, 11:04am UTC](https://forum.cmascenter.org/t/cmaq5-3-1-cctm-run-error-error-interpolating-variable-sltyp/1453/4 "2020-04-27T11:04:58Z")

</div>

**What about the file? Is is consistent with this?**