Originally posted by: abalkum

Hi,

I've been working with the new python doopl library for running opl models.  I'm trying to redirect the engine log to a file but the method doesn't seem seem to do anything.  After I run the following code:

from doopl.factory import *
with create_opl_model("C:\\Program Files\\IBM\\ILOG\\CPLEX_Studio128\\opl\\examples\\opl\\euler\\euler.mod") as opl:
        opl.redirect_engine_log("D:\\test.txt")
        opl.run()

I get the output (expected from euler.mod):

[[64 13 60 11 58 9 30 27]
         [61 6 63 8 29 26 57 38]
         [14 1 12 59 10 39 28 31]
         [5 62 7 40 25 56 37 46]
         [2 15 4 51 36 47 32 55]
         [19 22 17 24 41 52 45 48]
         [16 3 20 35 50 43 54 33]
         [21 18 23 42 53 34 49 44]]

but "text.txt" is just an empty file.

Originally posted by: Viu-Long Kong

Hi,

As it is implemented in current version of doopl, redirect_engine_log(filename) will flush and close the file only when the program exits.

I will work on a fix for the next version. Thanks for the report.

Originally posted by: abalkum

Thanks for the response.  I was hoping that it would flush after the "with" statement.  Unfortunately, doopl will be hard for me to utilize without output logging to a file during execution.  I look forward to the fix.