Index: openacs-4/packages/xotcl-core/tcl/06-package-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xotcl-core/tcl/06-package-procs.tcl,v
diff -u -r1.41.2.58 -r1.41.2.59
--- openacs-4/packages/xotcl-core/tcl/06-package-procs.tcl	16 Aug 2024 13:55:53 -0000	1.41.2.58
+++ openacs-4/packages/xotcl-core/tcl/06-package-procs.tcl	25 Aug 2024 17:05:12 -0000	1.41.2.59
@@ -254,13 +254,20 @@
         # the call and result.
         #
         set site_wide_instance_id [::xo::xotcl_package_cache eval site_wide_package-${:package_key} {
-          acs_admin::require_site_wide_package \
-              -package_key ${:package_key} \
-              -configuration_command $cmd}]
+          set r [acs_admin::require_site_wide_package \
+                     -package_key ${:package_key} \
+                     -configuration_command $cmd]
+          if {$r eq ""} {
+            ns_log warning "acs_admin::require_site_wide_package -package_key ${:package_key}" \
+                "returned empty pacakge_id. Do not cache!"
+            break
+          }
+          set r
+        }]
       }
-
+      
       #ns_log notice "======require_site_wide_info site_wide_instance_id -> <$site_wide_instance_id>"
-
+      
       #
       # During install, no xo::cc is available, but it seems to be
       # needed for instantiating prototype pages. So provide a best
@@ -281,7 +288,7 @@
     }
     return ${:site_wide_info}
   }
-
+  
   PackageMgr instproc configure_fresh_instance {
     {-package_id:required}
     {-parameter_page_info ""}