[Help-glpk] glpk49vb

[address@hidden]

I am have been using the VB implementation of GLPK for quite a while and I am 
having  the following problem. I write a problem in cplex format and load the 
file as follows.
        ' load the problem from file 
        ' 
        lp = glpk_read_cpxlp(sPath) 
         
        ' Find Simplex solution 
        ' 
        lRet = glpk_simplex(lp) 
        Print "GLPK SIMPLEX: " & lRet 
        ' Find MIP solution 
        '        
        lRet = glpk_integer(lp) 
        Print "GLPK INTEGER: " & lRet 
 
the glpk_integer returns an error of 204 - cannot start search. 
but if I use glpsol.exe to test the formualtion it finds a mip solution in less 
than a 
second. So I am confident that the formulation is ok and that a mip solution 
exists. 
 
Has anyone got any ideas as to why the VB implemtation is returning an error 
when glpsol.exe can find a solution with the same formulation. 
 
 
Regards, 
Max