# JuMP 0.21.1: CPLEX Error 1811: Attempt to invoke unsupported operation

**URL:** <https://discourse.julialang.org/t/jump-0-21-1-cplex-error-1811-attempt-to-invoke-unsupported-operation/36605>\
**Category:** Optimization (Mathematical)\
**Created:** [March 27, 2020, 4:48pm UTC](https://discourse.julialang.org/t/jump-0-21-1-cplex-error-1811-attempt-to-invoke-unsupported-operation/36605 "2020-03-27T16:48:34Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![mike\_k](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mike_k/32/211864_2.png) [@mike\_k](https://discourse.julialang.org/u/mike_k)\
**Post date:** [March 28, 2020, 9:48am UTC](https://discourse.julialang.org/t/jump-0-21-1-cplex-error-1811-attempt-to-invoke-unsupported-operation/36605/3 "2020-03-28T09:48:57Z")

</div>

Thanks @odow it works, however, it is still strange. Compared to JuMP 0.18.5 it is super slow meaning that in my problem the function which adds cuts ( `MOI.submit(model, MOI.LazyConstraint(cb_data), con)`) is called significant more often with JuMP 0.21. And also the runtime is significant larger with JuMP 0.21. Here are some outputs for one and the same problem instance:

JuMP 0.21 | CPLEX 12.9 (or 12.8,… it is the same for both version)

```julia
* 0+ 0 135.8195 316.6316 133.13%
      0 0 289.0692 10 135.8195 UserPurge2: 1 127 112.83%
      0 0 283.7922 10 135.8195 UserPurge1: 75 213 108.95%
      0 0 282.6926 13 135.8195 UserPurge1: 58 241 108.14%
* 0+ 0 198.3479 282.6926 42.52%
      0 0 279.8942 14 198.3479 UserPurge1: 109 287 41.11%
      0 0 279.7246 12 198.3479 UserPurge1: 6 301 41.03%
      0 0 279.3128 14 198.3479 UserPurge1: 40 320 40.82%
      0 0 279.0657 14 198.3479 UserPurge1: 25 338 40.70%
      0 0 278.7915 15 198.3479 UserPurge1: 85 359 40.56%
      0 0 278.7157 14 198.3479 UserPurge1: 72 370 40.52%
      0 0 278.6908 14 198.3479 UserPurge1: 10 373 40.51%
      0 0 278.6722 15 198.3479 UserPurge1: 64 378 40.50%

runtime: ~150s
# lazy cut calls: 11313
# user cut calls: 30521
# BB explored nodes: 51

```

JuMP 0.18.5 | CPLEX 12.8

```julia
* 0+ 0 0.0000 539.4865 --- 
      0 0 316.6316 6 0.0000 384.4218 118 --- 
* 0+ 0 135.6275 316.6316 133.46%
      0 0 289.8484 10 135.6275 Fract: 1 128 113.71%
      0 0 283.9790 11 135.6275 Fract: 1 141 109.38%
* 0+ 0 172.8079 283.9790 64.33%
* 0+ 0 200.7656 283.9790 41.45%
      0 2 219.9258 5 200.7656 219.9172 297 9.54%

runtime: ~24s
# lazy cuts calls: 1182
# user cuts calls: 3141
# BB explored nodes: 47

```

It seems that the add-cut functions are called but the cuts are not added. Is it possibly a bug, or just a default setting issue?

---

_[View the full topic](https://discourse.julialang.org/t/jump-0-21-1-cplex-error-1811-attempt-to-invoke-unsupported-operation/36605)._