NL File format: "Method Error: convert(Expr, Float64)" when trying to parse V section of NL file

[GiovanniKarra]

When trying to parse an NL file with the latest commit of MOI, it throws a method error at this line, while trying to convert a Float64 to an Expr.
What is surprising to me is that when this parsing function wasn't implemented yet, the file was loaded without issue.

Here is a list of files where this occurs:

• deconvc.nl
• deconvu.nl
• deconvb.nl

Corresponding AMPL mod files if you find it useful:

• deconvc.mod
• deconvu.mod
• deconvb.mod

[odow]

Thanks, I'll take a look at this today.

[odow]

Fixed in #2980

What is surprising to me is that when this parsing function wasn't implemented yet, the file was loaded without issue.

Not sure what you mean by this? With the prior release of MOI, I get:

julia> using JuMP

julia> model = read_from_file("/Users/odow/Downloads/deconvc.nl")
ERROR: Unable to parse NL file : we don't support common exprs
Stacktrace:
  [1] error(s::String)
    @ Base ./error.jl:44
  [2] _parse_header(io::IOStream, model::MathOptInterface.FileFormats.NL._CacheModel)
    @ MathOptInterface.FileFormats.NL ~/.julia/packages/MathOptInterface/Q3V1z/src/FileFormats/NL/read.jl:400
  [3] read!(io::IOStream, model::MathOptInterface.FileFormats.NL.Model)
    @ MathOptInterface.FileFormats.NL ~/.julia/packages/MathOptInterface/Q3V1z/src/FileFormats/NL/read.jl:41