The command for withdraw VESTS (convert VESTS to STEEM) is not that difficult. But due to a minor bug, it can be annoying thing to you. Here's a small tip.
A correct command:
withdraw_vesting YourID "0.000001 VESTS" true
A wrong command (that gives you an error)
withdraw_vesting YourID "0.001 VESTS" true
What's the difference?
DIGITS!
Now you must enter 6 digits to avoid the error. Once the bug is fixed, I will inform it in this thread.
Best,
clayop