1 files changed, 22 insertions, 1 deletions
diff --git a/src/OutputScalar.c b/src/OutputScalar.c
index a744164..4ac6c5f 100644
--- a/src/OutputScalar.c
+++ b/src/OutputScalar.c
@@ -24,11 +24,21 @@ CCTK_FILEVERSION(CactusBase_IOBasic_OutputScalar_c)
 
 
 /********************************************************************
+ ********************    Static Variables    ************************
+ ********************************************************************/
+/* flag whether CheckSteerableParameters() needs to be called */
+static int check_steerable_parameters = 1;
+
+
+/********************************************************************
  ********************    Internal Routines   ************************
  ********************************************************************/
 static void CheckSteerableParameters (iobasicGH *myGH);
 
 
+/********************************************************************
+ ********************    External Routines   ************************
+ ********************************************************************/
 /*@@
    @routine    IOBasic_ScalarOutputGH
    @date       Sat March 6 1999
@@ -57,6 +67,7 @@ int IOBasic_ScalarOutputGH (const cGH *GH)
   iobasicGH *myGH;
 
 
+  /* check if any steerable parameters have changed */
   myGH = CCTK_GHExtension (GH, "IOBasic");
   CheckSteerableParameters (myGH);
 
@@ -68,6 +79,9 @@ int IOBasic_ScalarOutputGH (const cGH *GH)
 
   retval = 0;
 
+  /* disable the check for steerable parameters during the following loop */
+  check_steerable_parameters = 0;
+
   /* loop over all variables */
   for (vindex = CCTK_NumVars () - 1; vindex >= 0; vindex--)
   {
@@ -80,6 +94,9 @@ int IOBasic_ScalarOutputGH (const cGH *GH)
     }
   }
 
+  /* enable the check for steerable parameters for following calls */
+  check_steerable_parameters = 1;
+
   return (retval);
 }
 
@@ -218,7 +235,11 @@ int IOBasic_TimeForScalarOutput (const cGH *GH, int vindex)
   /* Get the GH extension for IOBasic */
   myGH = CCTK_GHExtension (GH, "IOBasic");
 
-  CheckSteerableParameters (myGH);
+  /* only need to check steerable parameters if this flag is set */
+  if (check_steerable_parameters)
+  {
+    CheckSteerableParameters (myGH);
+  }
 
   /* check if any output was requested */
   if (myGH->outScalar_every <= 0 || GH->cctk_iteration % myGH->outScalar_every