LP360 Strip Align Error: TypeError: can only concatenate list (not "str") to list

🛑Problem:

You're encountering the following error while running Strip Align in LP360:

TypeError: can only concatenate list (not "str") to list

🧠 Root Cause

This error typically occurs in the Strip Align workflow due to a mismatch in data types within the Python script used by LP360. 

✅ Probable Resolution#1:

Preserve Cycle Identifiers in LAS Layer Names

Ensure that LAS layers in the Table of Contents (TOC) retain their original Cycle identifiers (e.g., C250303_210516). Renaming layers and removing these identifiers can cause the Strip Align process to fail.

✅ Probable Resolution#2:

Avoid Premature LAS Merging

Do not merge LAS files before running Strip Align. Let the tool handle merging internally to ensure proper flight line identification and processing.