Closing of OMCSession

[christiankral]

When I run perform batch processes based on OMJulia, several hundret calls of OMCSession are performed.

After that I have many abandonded processes which push the RAM consumption of my (Linux) computer to its limits.

I could neither find in the documentation nor in the examples, how I can free the memory resources by closing the used OMCSession. My question thus refers to an equivalence of close, used after openening and writing a file. Is such closing alread implemented? If not, it possibly should be implemented.

[arun3688]

@christiankral to delete a session you have to use quit() like sendExpression(omc, "quit()")

[christiankral]

I tried the following:

using OMJulia
mod = OMJulia.OMCSession()
sendExpression(mod, "quit()")

The third line causes an error message:

ERROR: OMJulia.Parser.ParseError("Expected EOF, got output Any[OMJulia.Parser.Identifier(\"requested\"), Symbol(\",\"), OMJulia.Parser.Identifier(\"shutting\"), OMJulia.Parser.Identifier(\"server\"), OMJulia.Parser.Identifier(\"down\")]")
Stacktrace:
 [1] parseOM(tokens::Vector{Any})
   @ OMJulia.Parser ~/.julia/packages/OMJulia/GiA9Y/src/parser.jl:121
 [2] parseOM
   @ ~/.julia/packages/OMJulia/GiA9Y/src/parser.jl:127 [inlined]
 [3] sendExpression(omc::OMJulia.OMCSession, expr::String; parsed::Bool)
   @ OMJulia ~/.julia/packages/OMJulia/GiA9Y/src/OMJulia.jl:184
 [4] sendExpression(omc::OMJulia.OMCSession, expr::String)
   @ OMJulia ~/.julia/packages/OMJulia/GiA9Y/src/OMJulia.jl:180
 [5] top-level scope
   @ REPL[3]:1

[arun3688]

@christiankral , It seems there is a problem with Julia parser when parsing the results from omc, please disable the parser like below

julia> omc = OMJulia.OMCSession()
julia> sendExpression(omc, "getVersion()")
"OpenModelica v1.20.0-dev-101-g55feca18f5 (64-bit)"
julia> sendExpression(omc, "quit()", parsed=false)
"quit requested, shutting server down\n"

[christiankral]

OK. the option parsed=false seems to work:

sendExpression(omc, "getVersion()")
"OpenModelica 1.20.0~dev-121-gfa321a0"
sendExpression(omc, "quit()", parsed=false)
"quit requested, shutting server down\n"

[christiankral]

@arun3688 Is the option parsed=false already the full solution to my request or is it a parsing issue that needs to be solved?

[arun3688]

@christiankral Well the immediate solution is to use parsed = false, but offcourse we need to fix the parser

[arun3688]

Hi OliWard, From the error message i can see that you are using old version of OMJulia, please update your OMJulia package with the latest master and perform the test. regards arun

…

On Tue, Feb 14, 2023 at 3:35 PM Oli Ward ***@***.***> wrote: @arun3688 <https://github.com/arun3688> Apologies that this is an old thread but I am also encountering issues closing OMCSessions. Using sendExpression(omc, "quit()") produces ERROR: OMJulia.Parser.ParseError as @christiankral <https://github.com/christiankral> posted above. However, when I try sendExpression(omc, "quit()", parsed=false), I get a method error: ERROR: MethodError: no method matching sendExpression(::OMJulia.OMCSession, ::String; parsed=false) Closest candidates are: sendExpression(::Any, ::Any) at ~/.julia/packages/OMJulia/ZLXEs/src/OMJulia.jl:1012 got unsupported keyword argument "parsed" Stacktrace: [1] test() @ Main.OMJ_V2 ./REPL[53]:15 [2] top-level scope @ REPL[54]:1``` — Reply to this email directly, view it on GitHub <#62 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABUNPJO6FYKRPZLBQE3IOQDWXOJ23ANCNFSM5YMM4OLA> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[Wardi0]

Hi @arun3688,

Thank you for your quick reply. My issue stopped when I restarted my Julia session but I have also updated OMJulia since, thanks for pointing that out!