Index: trunk/psModules/src/camera/pmFPAfile.c
===================================================================
--- trunk/psModules/src/camera/pmFPAfile.c	(revision 11793)
+++ trunk/psModules/src/camera/pmFPAfile.c	(revision 12299)
@@ -51,4 +51,6 @@
     psFree (file->extxtra);
 
+    psFree(file->detrend);
+
     psFree (file->filename);
     psFree (file->extname);
@@ -91,4 +93,6 @@
     file->state = PM_FPA_STATE_CLOSED;
 
+    file->detrend = NULL;
+
     file->xBin = 1;
     file->yBin = 1;
@@ -173,5 +177,5 @@
 
 // select the rule from the camera configuration, perform substitutions as needed
-char *pmFPAfileNameFromRule (char *rule, pmFPAfile *file, const pmFPAview *view)
+psString pmFPAfileNameFromRule(const char *rule, const pmFPAfile *file, const pmFPAview *view)
 {
     PS_ASSERT_PTR_NON_NULL(rule, NULL);