Too address the fatal error encountered during the execution of a Node.js task or NPM command, particularly the following example:

npm config set prefix "F:\nodejs\node_global"

Where the error message indicates an Allocation failed - JavaScript heap out of memory issue, as detailed:

FATAL ERROR: MarkCompactCollector: semi-space copy, fallback in old gen Allocation failed - JavaScript heap out of memory

<-- Last few GCs -->
38340 ms: Scavenge 1389.9 (1435.0) -> 1389.9 (1435.0) MB, 36.7 / 0 ms [allocation failure]. 38378 ms: Scavenge 1389.9 (1435.0) -> 1389.9 (1435.0) MB, 37.6 / 0 ms [allocation failure]. 38415 ms: Scavenge 1389.9 (1435.0) -> 1389.9 (1435.0) MB, 37.6 / 0 ms [allocation failure]. 38452 ms: Scavenge 1389.9 (1435.0) -> 1389.9 (1435.0) MB, 36.6 / 0 ms [allocation failure].

To resolve the issue, proceed with the following steps:

1. Locate and remove the user-specific npmrc configuraton file. This file is typically found at the directory path below:

   C:\Users\{your_username}\.npmrc
   

   Ensure that you do not confuse this file with the global or project-specific npmrc files in other locations.

Deleting the npmrc file will reset the local configurations, potentially removing incompatible or problematic settings that caused the memory allocation failure.