| More docs on the ARB website. See also index of helppages. Last update on 22. May 2026 .

Main topics: ARB: a Short Introduction Glossary | Related topics: ARB: Basic ARB-Shell Commands
# How to fix an 'exec' problem ? OCCURRENCE DESCRIPTION WHAT TO DO WARNINGS BUGS ## OCCURRENCE
### NDS + ACI exec - command
## DESCRIPTION
### If you use the exec command in the NDS window then you might have to wait extremely long: number of species * execution time of the command (5000 species, 1.5 sec/exec) -> 2 hour waiting.
## WHAT TO DO
### The only way the to remove the exec command is: run arb_panic on any shell save the database to /tmp/panic.arb edit /tmp/panic.arb search the exec command replace it by the 'echo' command save file test it with 'arb /tmp/panic.arb' If everything works fine save it in your home directory enter 'arb_clean' on any shell remove /tmp/panic.arb
## WARNINGS
### Test your database very carefully because it may not be consistent. Check sequence checksum
## BUGS
### No bugs known