1 files changed, 14 insertions, 0 deletions
diff --git a/src/Startup.c b/src/Startup.c
index 2f9ada8..38ad63b 100644
--- a/src/Startup.c
+++ b/src/Startup.c
@@ -51,6 +51,20 @@ void IOPanda_Startup (void)
   int IO_GHExtension;
   int IOMethod;
 
+
+  if (CCTK_GHExtensionHandle ("IO") < 0)
+  {
+    CCTK_WARN (1, "Thorn IOUtil was not activated. "
+                  "No IOPanda IO methods will be enabled.");
+    return;
+  }
+  if (CCTK_GHExtensionHandle ("PUGH") < 0)
+  {
+    CCTK_WARN (1, "Thorn PUGH was not activated. "
+                  "No IOPanda IO methods will be enabled.");
+    return;
+  }
+
   IO_GHExtension = CCTK_RegisterGHExtension ("IOPanda");
   CCTK_RegisterGHExtensionSetupGH (IO_GHExtension, IOPanda_SetupGH);
   CCTK_RegisterGHExtensionInitGH (IO_GHExtension, IOPanda_InitGH);