Updated env

tzis/tzis.py

@@ -660,7 +660,10 @@ class Tzis:
         maxretries,
         trusted,
     ):
-        chunked_ds, is_safe_chunk = rechunk(ds, varname, chunkdim, target_mb, self.verbose)
+        is_safe_chunk = True
+        chunked_ds = ds
+        if target_mb != 0 :
+            chunked_ds, is_safe_chunk = rechunk(ds, varname, chunkdim, target_mb, self.verbose)
         #
         retries = 0
         success = -1