# \[AMPL 25086\] Error at \_cmdno 26 executing "solve" command
**URL:** https://discuss.ampl.com/t/ampl-25086-error-at-cmdno-26-executing-solve-command/2219
**Category:** Google Group Mirror
**Created:** [January 30, 2026, 8:11pm UTC](https://discuss.ampl.com/t/ampl-25086-error-at-cmdno-26-executing-solve-command/2219 "2026-01-30T20:11:59Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Vivi](https://discuss.ampl.com/u/Vivi)
#### Post date: [January 30, 2026, 8:11pm UTC](https://discuss.ampl.com/t/ampl-25086-error-at-cmdno-26-executing-solve-command/2219/1 "2026-01-30T20:11:59Z")
Dear AMPL team,
I am reading my data from spreadsheet and I have a set of only one member and a parameter related to this set. The Excel file is attached. And in the .run file to read the spreadsheet I have thoses statements:
table EPSI\_tab IN “amplxl” “EPSI\_VAL.xlsx” “epsi”:
[EPSI], EP\_VAL;
read table EPSI\_tab;
And I have had the following error message:
«error processing param EP\_VAL[…]:
no data for set EPSI
ampl: »
Thank in advance for your help.
> **(attachments)**
>
> [EPSI\_VAL.xlsx](https://discuss.ampl.com/uploads/short-url/biJKeyE0SOpW4NOGHRgmtGx1tqI.xlsx) (9.85 KB)
---
### Author:  [@4er](https://discuss.ampl.com/u/4er)
#### Post date: [January 31, 2026, 7:20pm UTC](https://discuss.ampl.com/t/ampl-25086-error-at-cmdno-26-executing-solve-command/2219/2 "2026-01-31T19:20:09Z")
When the set is described as `[EPSI]` in the `table` statement, `read table EPSI_tab` assumes that the members of `EPSI` are known, and only the values for `EP_VAL` will be read from the spreadsheet.
To tell the `read table` statement to read _both_ members of set `EPSI` and values of param `EP_VAL` from the spreadsheet, add `EPSI <-` before `[EPSI]`:
```auto
table EPSI_tab IN "amplxl" "EPSI_VAL.xlsx" "epsi":
EPSI <- [EPSI], EP_VAL;
```
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### Author:  [@AMPL\_Google\_Group1](https://discuss.ampl.com/u/AMPL_Google_Group1)
#### Post date: [January 31, 2026, 7:21pm UTC](https://discuss.ampl.com/t/ampl-25086-error-at-cmdno-26-executing-solve-command/2219/3 "2026-01-31T19:21:06Z")
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### Author:  [@Vivi](https://discuss.ampl.com/u/Vivi)
#### Post date: [February 2, 2026, 2:41pm UTC](https://discuss.ampl.com/t/ampl-25086-error-at-cmdno-26-executing-solve-command/2219/4 "2026-02-02T14:41:07Z")
Many thanks for your help! I highly appreciate it.