Index: openexr-3.2.2/src/lib/OpenEXRCore/parse_header.c
===================================================================
--- openexr-3.2.2.orig/src/lib/OpenEXRCore/parse_header.c
+++ openexr-3.2.2/src/lib/OpenEXRCore/parse_header.c
@@ -2293,7 +2293,9 @@ internal_exr_compute_chunk_offset_size (
 
     w = (uint64_t) (((int64_t) dw.max.x) - ((int64_t) dw.min.x) + 1);
 
-    if (curpart->tiles)
+    if (curpart->storage_mode != EXR_STORAGE_SCANLINE &&
+       curpart->storage_mode != EXR_STORAGE_DEEP_SCANLINE &&
+       curpart->tiles)
     {
         const exr_attr_tiledesc_t* tiledesc  = curpart->tiles->tiledesc;
         int64_t                    tilecount = 0;