Hi,

the current gretl_io.jl combined with a freshly downloaded julia-1.0.2 provokes the following error:

.... julia-1.0.2/bin/julia exited with status 256
stderr:
ERROR: LoadError: `write` is not supported on non-isbits arrays

Stacktrace:
 [1] error(::String) at ./error.jl:33
 [2] macro expansion at ./gcutils.jl:86 [inlined]
 [3] write(::IOStream, ::Array{Any,2}) at ./io.jl:532
 [4] gretl_export(::Array{Any,2}, ::String, ::Int64) at /home/ <...> /.gretl/gretl_io.jl:35
 [5] gretl_export(::Array{Any,2}, ::String) at /home/< ...> /.gretl/gretl_io.jl:10

Compare this entry in the julia 0.7.0 changelog (https://docs.julialang.org/en/v0.7.0/NEWS/):

"Calling write on non-isbits arrays is deprecated in favor of explicit loops or serialize (#6466)."

So it seems to me that gretl_io.jl needs updating. Which should it be, explicit loop or serialize?

thanks,

sven