Upon a warning on a model issue, ngspice should not bail out,

even if strict_error is set, as typically the simulation will
run and foreign models often have additional unsupported, but
less important parameters.

It shall however, exit if the simulation is interrupted due
to an error and strict_errorhandling is set.

src/frontend/inp.c

@@ -1447,17 +1447,20 @@ inp_dodeck(
                     else if (dd->linenum_orig == 0) {
                         fprintf(stderr, "Error on line:\n  %s\n%s\n",
                                    dd->line, dd->error);
+                        if (ft_stricterror)
+                            controlled_exit(EXIT_BAD);
                         have_err = TRUE;
                         return 1;
                     }
                     else {
                         fprintf(stderr, "Error on line %d or its substitute:\n  %s\n%s\n",
                                    dd->linenum_orig, dd->line, dd->error);
+                        if (ft_stricterror)
+                            controlled_exit(EXIT_BAD);
                         have_err = TRUE;
                         return 1;
                     }
-                    if (ft_stricterror)
-                        controlled_exit(EXIT_BAD);
+
                 } else {
                     fprintf(stderr, "%s\n", p);
                 }
@@ -1941,6 +1944,8 @@ com_source(wordlist *wl)
         Infile_Path = ngdirname(firstfile);
         if (inp_spsource(fp, FALSE, tempfile ? NULL : wl->wl_word, FALSE) != 0) {
             fprintf(stderr, "    Simulation interrupted due to error!\n\n");
+            if (ft_stricterror)
+                controlled_exit(EXIT_FAILURE);
         }
     }