diff --git a/inst/doc/faq.md b/inst/doc/faq.md
index fbf2efbc098210a04abd1d5a35cd207638e8521c..89e935e856742073090175f9f00f35bf20a3c56c 100644
--- a/inst/doc/faq.md
+++ b/inst/doc/faq.md
@@ -34,7 +34,7 @@ This document intends to be the first reference for any doubts that you may have
    1. [No space left on device](#1-no-space-left-on-device)
    2. [ecFlow UI remains blue and does not update status](#2-ecflow-ui-remains-blue-and-does-not-update-status)  
    3. [Compute() successfully but then killed on R session](#3-compute-successfully-but-then-killed-on-r-session)
-   4. [My jobs work well in workstation and fatnodes but not on Power9 (or vice versa)](#4-my-jobs-work-well-in-workstation-and-fatnodes-but-not-on-power9-or-vice-versa)
+   4. [My jobs work well in workstation and fatnodes but not on Power9/Nord3 (or vice versa)](#4-my-jobs-work-well-in-workstation-and-fatnodes-but-not-on-power9nord3-or-vice-versa)
    5. [Errors related to wrong file formatting](#5-errors-related-to-wrong-file-formatting) 
    6. [Errors using a new cluster (setting Nord3)](#6-errors-using-a-new-cluster-setting-nord3)
    7. [Start() fails retrieving data](#7-start-fails-retrieving-data)
@@ -1001,7 +1001,7 @@ When Compute() on HPCs, the machines are able to process data which are much lar
 Further explanation: though the complete output (i.e., merging all the chunks into one returned array) cannot be sent back to workstation, but the chunking results (.Rds file) are completed and saved in the directory '<ecflow_suite_dir>/STARTR_CHUNKING_<job_id>'. If you still want to use the chunking results, you can find them there.
 
 
-### 4. My jobs work well in workstation and fatnodes but not on Power9 (or vice versa)
+### 4. My jobs work well in workstation and fatnodes but not on Power9/Nord3 (or vice versa)
 
 There are several possible reasons for this situation. Here we list some of them, and please let us know if you find any other reason not listed here yet.
 - **R module or package version difference.** Sometimes, the versions among these 
@@ -1022,6 +1022,7 @@ to power9, you should put the files in Power9 instead of local workstation.)
 have one, go to [usecase.md](https://earth.bsc.es/gitlab/es/startR/tree/develop-FAQcluster/inst/doc/usecase) to find one!). 
 If it fails, it means that your connection to machine or the ecFlow setting has 
 some problem.
+- **Check 'return_vars' parameter in Start.** If the variable (usually set in 'var') is requested in 'return_vars' parameter of ´Start()´, the execution in a HPC cluster may fail. 
 
 ###  5. Errors related to wrong file formatting