Initializing help system before first use

problem.getlasterror

problem.getlasterror

Purpose
Returns the error message corresponding to the last error triggered by a library function.
Synopsis
s = problem.getlasterror()
Example 1
The following shows how this function might be used in error-checking: 
p.solve()
print("Current error status:", p.getlasterror())
Example 2 
x = xpress.var()
try:
    p.addVariable(x)
    p.addVariable(x)
except RuntimeError as e:
    print(e)
Example 3 
try:
    p.addVariable('John Cleese')
except RuntimeError as e:
    print(e)
Further information
The problem.getlasterror() function is an API wrapper for the XPRSgetlasterror() function in the Xpress C API. For this reason, errors that occur within the Xpress API are reported by getlasterror(). Errors that occur at the level of the Python interface are not reported by getlasterror. Both classes of errors can be handled with a try/ except construct. In the two examples below, the first is an error that is detected by the Xpress API and propagated to a Python error, while the second is an incorrect statement for the Python module. They both trigger a RuntimeError exception.
Related topics
problem.addcbmessage, problem.setlogfile.

Parent Topic Reference Manual

© 2001-2020 Fair Isaac Corporation. All rights reserved. This documentation is the property of Fair Isaac Corporation (“FICO”). Receipt or possession of this documentation does not convey rights to disclose, reproduce, make derivative works, use, or allow others to use it except solely for internal evaluation purposes to determine whether to purchase a license to the software described in this documentation, or as otherwise set forth in a written software license agreement between you and FICO (or a FICO affiliate). Use of this documentation and the software described in it must conform strictly to the foregoing permitted uses, and no other use is permitted.