fix: don't return OK for GLPK status integer undefined (#449)

siddharth-krishna · web-flow · commit 44d6c7f7241d · 2025-04-26T08:47:41.000+02:00
diff --git a/doc/release_notes.rst b/doc/release_notes.rst
@@ -9,6 +9,7 @@ Upcoming Version
 * Fix the parsing of solutions returned by the CBC solver when setting a MIP duality
   gap tolerance.
 * Improve the mapping of termination conditions for the SCIP solver
+* Treat GLPK's `integer undefined` status as not-OK
 
 Version 0.5.3
 --------------
diff --git a/linopy/solvers.py b/linopy/solvers.py
@@ -573,6 +573,7 @@ def solve_problem_from_file(
         """
         CONDITION_MAP = {
             "integer optimal": "optimal",
+            "integer undefined": "infeasible_or_unbounded",
             "undefined": "infeasible_or_unbounded",
         }
         sense = read_sense_from_problem_file(problem_fn)

Original file line number	Diff line number	Diff line change
`@@ -573,6 +573,7 @@ def solve_problem_from_file(`
`573`	`573`	`"""`
`574`	`574`	`CONDITION_MAP = {`
`575`	`575`	`"integer optimal": "optimal",`
	`576`	`+ "integer undefined": "infeasible_or_unbounded",`
`576`	`577`	`"undefined": "infeasible_or_unbounded",`
`577`	`578`	`}`
`578`	`579`	`sense = read_sense_from_problem_file(problem_fn)`