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Published Jul. 2, 2025

"Version specific upgrade task must return function" error when running gulp upgrade command

Written By

Alfonso Crisci

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Issue

  • While upgrading a theme created with Theme Generator and running the step of upgrading the theme itself (gulp upgrade), the below error message will be returned:
    [18:20:11] Starting 'upgrade'...
    [18:20:11] 'upgrade' errored after 680 μs
    [18:20:11] Error in plugin "gulp-theme-upgrader"
    Message:
     Version specific upgrade task must return function.

Environment

  • Liferay DXP 7.0+

Resolution

  • Supply the final destination version as an argument to the command. For example, for 7.2 DXP:
    gulp upgrade -v 7.2

Additional Information

 

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