Import failures usually come down to file format, column mapping, or a plan cap.
Format
MapVS imports CSV and JSON. CSV must have a header row. Required columns: stage, order, cycle_time_hrs, wait_time_hrs, value_add. Everything else is optional.
Column names
Column names in the header row must match exactly (case-sensitive). If your source has different names, rename them before importing.
Plan cap
Free plan caps at 5 stages per map. If your import is larger than the plan allows, only the first N stages will import. Upgrade to Starter (unlimited stages) to import larger processes.
Import from Excel
Excel exports to CSV cleanly, but watch for two gotchas: (1) UTF-8 encoding - use "Save As CSV UTF-8" not the default; (2) Excel occasionally reformats numbers as text - format the columns as Number before saving.