Index: /issm/trunk-jpl/src/c/modules/ModelProcessorx/Autodiff/CreateParametersAutodiff.cpp
===================================================================
--- /issm/trunk-jpl/src/c/modules/ModelProcessorx/Autodiff/CreateParametersAutodiff.cpp	(revision 19488)
+++ /issm/trunk-jpl/src/c/modules/ModelProcessorx/Autodiff/CreateParametersAutodiff.cpp	(revision 19489)
@@ -134,4 +134,6 @@
 				#ifdef _HAVE_GSL_
 				theAdolcEDF_p->GetParameterValue().myEDF_for_solverx_p=reg_ext_fct(EDF_for_solverx);
+				#else
+				_error_("requesting GSL solver without GSL being compiled in!");
 				#endif
 			    break;