[Cbc] readLp fails to read LP problem without 'subjject to'

[Kish Shen]

Hi,

I am unable to read the following simple LP file with readLp() using Cbc:

\ENCODING=ISO-8859-1
\Problem name: eclipse

Minimize
 obj: - 2 x1 - x2 - x3
Bounds
 0 <= x1 <= 1
 0 <= x2 <= 1
 0 <= x3 <= 1
SOS
 s1: S1 ::  x1 : 1  x2 : 2  x3 : 3
End

I get the message:

[kshn at hermes Eplex]$ ./cbcreadlp
 ### ERROR: Change MAX_OBJECTIVES to larger number.

I think the message starting from '###' comes from CoinLpIO.cpp, in
read_moniom_obj:

    if (*num_objectives == MAX_OBJECTIVES){
       char str[8192];
       sprintf(str,"### ERROR: Too many objective functions.\n");
       sprintf(str,"### ERROR: Change MAX_OBJECTIVES to larger number.\n");
       throw CoinError(str, "read_monom_obj", "CoinLpIO", __FILE__,
__LINE__);
    }

abd is because there is no 'subject to' section, as the only constraints on
this problem is the SOS. When I added a 'Subject to' line following the
objective, the file was read.

I include a program to reproduce this problem, and the above lp problem
with the filename the program uses.

The LP file was generated by CPLEX, and it is able to read the file back in.

Thanks and cheers,

Kish
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