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diff --git a/tests/general_tests/intfminbnd/intfminbnd_logical9.sce b/tests/general_tests/intfminbnd/intfminbnd_logical9.sce
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+++ b/tests/general_tests/intfminbnd/intfminbnd_logical9.sce
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+//testing log function; log is not defined at the its minimum
+function y = fun(x)
+ y = log(x);
+endfunction
+x1 = [-10];
+x2 = [0];
+intcon=[1];
+[xopt,fopt,exitflag,output,lambda] = intfminbnd (fun,intcon, x1, x2)
+
+
+// !--error 999
+
+// Ipopt has failed to solve the problem!
+// at line 310 of function intfminbnd called by :
+// [xopt,fopt,exitflag,output,lambda] = intfminbnd (fun,intcon, x1, x2)
+// at line 7 of exec file called by :
+// exec intfminbnd_logical9.sce