Error when calling Highs_writeOptions

[GregPlowman]

From the intro docs,

To print the list of options supported by HiGHS, do:

using HiGHS
model = HiGHS.Optimizer()
Highs_writeOptions(model, "options.txt")
println(read("options.txt", String))

I get this error:

Julia-1.7.1> Highs_writeOptions(model, "options.txt")
ERROR: could not load symbol "Highs_writeOptions":
The specified procedure could not be found.
Stacktrace:
 [1] Highs_writeOptions(highs::HiGHS.Optimizer, filename::String)
   @ HiGHS C:\Users\plowman\.julia\packages\HiGHS\gxmTb\src\gen\libhighs_api.jl:120
 [2] top-level scope
   @ REPL[3]:1

[odow]

What is ] st? Works for me on macOS.

[GregPlowman]

Windows 10, Julia 1.7.1, HiGHS v0.3.0

I suspect it's a Windows issue.

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  [6e4b80f9] BenchmarkTools v1.2.2
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  [86223c79] Graphs v1.4.1
  [f67ccb44] HDF5 v0.15.7
  [cd3eb016] HTTP v0.9.17
  [87dc4568] HiGHS v0.3.0
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  [fdbf4ff8] XLSX v0.7.8

[odow]

Does the rest of HiGHS work?

[GregPlowman]

Does the rest of HiGHS work?

Yes, AFAICT.

I was investigating HiGHS multi-threading (since multi-threading seems broken for Cbc on Windows) Wasn't sure whether optimizer_with_attributes(HiGHS.Optimizer, "highs_min_threads"=>8) was enough for parallel solve. Which then led me to investigate HiGHS options and this issue.

[GregPlowman]

I just noticed there was an update to HiGHS yesterday. Checked out HiGHS#master and now it works! (Sorry I didn't notice this earlier)

[odow]

Just tagged a new version

[GregPlowman]

Thanks! I can confirm that HiGHS v0.3.1 works.