diff --git a/zetta_utils/mazepa_layer_processing/common/subchunkable_apply_flow.py b/zetta_utils/mazepa_layer_processing/common/subchunkable_apply_flow.py
index d82dcd03..e3ebb76b 100644
--- a/zetta_utils/mazepa_layer_processing/common/subchunkable_apply_flow.py
+++ b/zetta_utils/mazepa_layer_processing/common/subchunkable_apply_flow.py
@@ -157,7 +157,7 @@ def build_postpad_subchunkable_apply_flow(  # pylint: disable=keyword-arg-before
         f"\t`processing_blend`:\t\t{tuple(processing_blend)}\t(at all levels)\n"
         "As core chunk sizes, before padding for crop and blend:\n"
         f"\t`processing_chunk_sizes`:"
-        "\t{', '.join(size.pformat() for size in processing_chunk_sizes)}\n"
+        f"\t{', '.join(size.pformat() for size in processing_chunk_sizes)}\n"
         "The bottom level chunk size will be respected to maintain the input size of "
         f"{tuple(processing_input_sizes[-1])} while the other levels will be "
         "treated as upper bounds, fitting in as many chunks as possible."
@@ -1158,11 +1158,11 @@ def _build_subchunkable_apply_flow(  # pylint: disable=keyword-arg-before-vararg
             error_str = (
                 "At each level (where the 0-th level is the smallest), the"
                 " `processing_chunk_size[level+1]` + 2*`processing_crop_pad[level+1]` + 2*`processing_blend_pad[level+1]`"
-                " + processing_gap must be"
+                " + `processing_gap` must be"
                 f" evenly divisible by the `processing_chunk_size[level]` + processing_gap (processing_gap applies only on top level).\n"
                 f"\nAt level {level}, received:\n"
                 f"`processing_chunk_size[level+1]`:\t\t\t\t\t\t{processing_chunk_size_higher}\n"
-                f"`applicable processing_gap`:\t\t\t\t\t\t\t\t{processing_gap_higher}\n"
+                f"`processing_gap`:\t\t\t\t\t\t\t\t{processing_gap_higher}\n"
                 f"`processing_crop_pad[level+1]` ((0, 0, 0) for the top level):\t\t\t{processing_crop_pad_higher}\n"
                 f"`processing_blend_pad[level+1]`:\t\t\t\t\t\t{processing_blend_pad_higher}\n"
                 f"Size of the region to be processed for the level:\t\t\t\t{processing_region}\n"