Index: trunk/psLib/src/fits/psFitsFloatFile.c
===================================================================
--- trunk/psLib/src/fits/psFitsFloatFile.c	(revision 15630)
+++ trunk/psLib/src/fits/psFitsFloatFile.c	(revision 16185)
@@ -44,5 +44,7 @@
     PS_ASSERT_FITS_NON_NULL(fits, PS_FITS_FLOAT_NONE);
 
-    if (!fits->conventions.psBitpix) {
+    psFitsOptions *options = fits->options; // FITS I/O options
+
+    if (!options || !options->conventions.psBitpix) {
         return PS_FITS_FLOAT_NONE;
     }