# \[AMPL 24544\] AMPL model

**URL:** https://discuss.ampl.com/t/ampl-24544-ampl-model/383
**Category:** Google Group Mirror
**Created:** [February 18, 2023, 1:21am UTC](https://discuss.ampl.com/t/ampl-24544-ampl-model/383 "2023-02-18T01:21:24Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![jiao\_janet](https://avatars.discourse-cdn.com/v4/letter/j/a5b964/32.png) [@jiao\_janet](https://discuss.ampl.com/u/jiao_janet)
#### Post date: [February 18, 2023, 1:21am UTC](https://discuss.ampl.com/t/ampl-24544-ampl-model/383/1 "2023-02-18T01:21:24Z")

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Hi,

I am doing a maximization problem, but my code is saying

error processing set M:

no value for m

Don’t know what to do with that.

These are my amps code

 ![Screenshot 2023-02-18 at 1.17.48 AM.png](https://us1.discourse-cdn.com/flex019/uploads/ampl/original/1X/3c67218ddf2185a41ebd4709ba53b0679974e1c8.png) ![Screenshot 2023-02-18 at 1.17.43 AM.png](https://us1.discourse-cdn.com/flex019/uploads/ampl/original/1X/d16650b5e31935afde5185dd439be47550bf0789.png) ![Screenshot 2023-02-18 at 1.18.01 AM.png](https://us1.discourse-cdn.com/flex019/uploads/ampl/original/1X/de808de7b8c30fe4ebf728685616c8f255db6271.png)

 ![Screenshot 2023-02-18 at 1.17.53 AM.png](https://us1.discourse-cdn.com/flex019/uploads/ampl/original/1X/01a2601313f7596706173d5c00b37008ca823243.png)

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<div class="post-metadata">

### Author: ![jiao\_janet](https://avatars.discourse-cdn.com/v4/letter/j/a5b964/32.png) [@jiao\_janet](https://discuss.ampl.com/u/jiao_janet)
#### Post date: [February 18, 2023, 5:56pm UTC](https://discuss.ampl.com/t/ampl-24544-ampl-model/383/2 "2023-02-18T17:56:00Z")

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![Screenshot 2023-02-18 at 5.55.42 PM.png](https://us1.discourse-cdn.com/flex019/uploads/ampl/original/1X/1d7fb8dbd6739e4d47c6fbbd00eae45cb5d342d8.png)

jiao janet \<[janet.jiao07076@gmail.com](mailto:janet.jiao07076@gmail.com)\> 于2023年2月18日周六 17:51写道：

 ![Screenshot 2023-02-18 at 1.17.48 AM.png](https://us1.discourse-cdn.com/flex019/uploads/ampl/original/1X/3c67218ddf2185a41ebd4709ba53b0679974e1c8.png)

 ![Screenshot 2023-02-18 at 1.17.43 AM.png](https://us1.discourse-cdn.com/flex019/uploads/ampl/original/1X/d16650b5e31935afde5185dd439be47550bf0789.png)

 ![Screenshot 2023-02-18 at 1.18.01 AM.png](https://us1.discourse-cdn.com/flex019/uploads/ampl/original/1X/de808de7b8c30fe4ebf728685616c8f255db6271.png)

 ![Screenshot 2023-02-18 at 1.17.53 AM.png](https://us1.discourse-cdn.com/flex019/uploads/ampl/original/1X/01a2601313f7596706173d5c00b37008ca823243.png)

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<div class="post-metadata">

### Author: ![AMPL\_Google\_Group](https://avatars.discourse-cdn.com/v4/letter/a/9dc877/32.png) [@AMPL\_Google\_Group](https://discuss.ampl.com/u/AMPL_Google_Group)
#### Post date: [February 19, 2023, 3:20pm UTC](https://discuss.ampl.com/t/ampl-24544-ampl-model/383/3 "2023-02-19T15:20:39Z")

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You are forgetting to read the data file. After “model S6Q11.mod” you need to give the command “data S6Q11.dat”.