Index: trunk/psModules/src/objects/pmPCMdata.c
===================================================================
--- trunk/psModules/src/objects/pmPCMdata.c	(revision 29546)
+++ trunk/psModules/src/objects/pmPCMdata.c	(revision 31153)
@@ -254,5 +254,6 @@
 
     pcm->nPix = nPix;
-    pcm->nDOF = nPix - nParams - 1;
+    pcm->nPar = nParams;
+    pcm->nDOF = nPix - nParams;
 
     return pcm;
@@ -341,5 +342,6 @@
 	return false;
     }
-    pcm->nDOF = pcm->nPix - nParams - 1;
+    pcm->nPar = nParams;
+    pcm->nDOF = pcm->nPix - nParams;
 
     // has the source pixel window changed?