Index: trunk/ppStac/src/ppStacCombine.c
===================================================================
--- trunk/ppStac/src/ppStacCombine.c	(revision 11116)
+++ trunk/ppStac/src/ppStacCombine.c	(revision 13247)
@@ -16,9 +16,12 @@
     psRegion region = psRegionSet(0, 0, 0, 0); // Region to read
     for (int i = 0; i < inputs->n; i++) {
+        psString resolved = pmConfigConvertFilename(options->inFiles->data[i], options->config, false);
         psImage *image = psFitsReadImage(options->inFiles->data[i], region, 0);
         if (!image) {
-            psError(PS_ERR_IO, false, "Unable to read image %d\n", i);
+            psError(PS_ERR_IO, false, "Unable to read image %s\n", resolved);
+            psFree(resolved);
             return false;
         }
+        psFree(resolved);
         inputs->data[i] = image;
     }