migrate-experiments.md

@@ -24,6 +24,12 @@ Before starting the migration, the following action is recommended:
 Also, create a `TEMP_DIR` that both accounts (the one offering the experiment and the one picking it) have access to. For example, in MN4 it is usually convenient to create it under `/gpfs/scratch/bsc32/${bsc32-user}`
 
 - `mkdir -p /gpfs/scratch/bsc32/${bsc32-user}/${EXPID}_TEMP_DIR`
+- `chmod -R g+rw /gpfs/scratch/bsc32/${bsc32-user}/${EXPID}_TEMP_DIR`
+
+Due to some jobs in the workflow (`NCTIME`, `EARTHDIAGS` for instance), an ${EXPID} folder in your bsc32 scratch already exists. Change the permission rights also of this folder with your bsc32 account:
+ 
+- `chmod -R g+rw /gpfs/scratch/bsc32/${bsc32-user}/${EXPID}`
+
 
 Also, for **Auto-EC-Earth** and **Auto-CALIOPE** experiments