CLLE - Variable Sized Environmental Variable.

I'm trying to update a CLLE program that someone else wrote, and I'm stuck with trying to make the change I want.

The program calls a script that does a SFTP process that requires a password. Different connections require different passwords. The way the program is currently setup, the password is assigned to an ENVVAR based on the connection needed.
This works as-is. However, all of the passwords are hard-coded into the CLLE program currently.

ADDENVVAR ENVVAR(PASSWORD) VALUE('ThePassword') +
REPLACE(*YES)

What I want to do is instead pull the password from a file so that the program doesn't need to be updated every time a new connection is needed.

ADDENVVAR ENVVAR(PASSWORD) VALUE(&FL1_Pass) +
REPLACE(*YES)

However this fails. Different passwords are different length so the field has to be long enough support them all (and future passwords), so I suspect the issue is that the trailing spaces that get pulled in are causing the connection to fail. I've tried adding %Trim to get rid of the spaces; however this isn't allowed.

ADDENVVAR ENVVAR(PASSWORD) VALUE(%Trim(&FL1_Pass)) +
REPLACE(*YES)

I've also tried adding
ALWVARLEN(*YES)
To the DCLF statement, but that hasn't helped.

Can anyone please point me in the right direction?

thanks

Shane Reeves