When CIDER is detected, until KLU works with CIDER, print Error: CIDER simulation is not (yet) supported with 'option klu'. Use 'option sparse' instead. and then call controlled exit(1).

src/include/ngspice/cidersupt.h

@@ -89,6 +89,15 @@ extern BOOLEAN hasSORConverged(double *, double *, int);
 extern BOOLEAN foundError(int );
 extern BOOLEAN compareFiletypeVar(char *);
 
-
+#ifdef KLU
+#define klu_support_for_cider \
+    if (ckt->CKTkluMODE) { \
+        fprintf(stderr, "Error: CIDER simulation is not (yet) supported with 'option klu'.\n"); \
+        fprintf(stderr, "    Use 'option sparse' instead.\n"); \
+        controlled_exit(1); \
+    }
+#else
+#define klu_support_for_cider
+#endif
 
 #endif

src/spicelib/devices/nbjt/nbjtset.c

@@ -44,6 +44,7 @@ NBJTsetup(SMPmatrix *matrix, GENmodel *inModel, CKTcircuit *ckt, int *states)
   ONEmaterial *pM, *pMaterial = NULL, *materialList = NULL;
   double startTime;
 
+  klu_support_for_cider
 
   /* loop through all the diode models */
   for (; model != NULL; model = NBJTnextModel(model)) {

src/spicelib/devices/nbjt2/nbt2set.c

@@ -47,7 +47,7 @@ NBJT2setup(SMPmatrix *matrix, GENmodel *inModel, CKTcircuit *ckt, int *states)
   DOPtable *dopTableList = NULL;
   double startTime;
 
- 
+   klu_support_for_cider
 
   /* loop through all the models */
   for (; model != NULL; model = NBJT2nextModel(model)) {

src/spicelib/devices/numd/numdset.c

@@ -45,6 +45,7 @@ NUMDsetup(SMPmatrix *matrix, GENmodel *inModel, CKTcircuit *ckt, int *states)
   DOPtable *dopTableList = NULL;
   double startTime;
 
+  klu_support_for_cider
 
   /* loop through all the models */
   for (; model != NULL; model = NUMDnextModel(model)) {

src/spicelib/devices/numd2/nud2set.c

@@ -47,6 +47,7 @@ NUMD2setup(SMPmatrix *matrix, GENmodel *inModel, CKTcircuit *ckt, int *states)
   DOPtable *dopTableList = NULL;
   double startTime;
 
+  klu_support_for_cider
 
   /* loop through all the models */
   for (; model != NULL; model = NUMD2nextModel(model)) {

src/spicelib/devices/numos/nummset.c

@@ -47,6 +47,8 @@ NUMOSsetup(SMPmatrix *matrix, GENmodel *inModel, CKTcircuit *ckt, int *states)
   DOPtable *dopTableList = NULL;
   double startTime;
 
+  klu_support_for_cider
+
   /* loop through all the models */
   for (; model != NULL; model = NUMOSnextModel(model)) {
     if (!model->NUMOSpInfo) {