Editing layouts in use (n00b question)

[parallax]

I'd like to work on an application during the business day when users are actively working. Specifically, I'd like to edit layouts that may or may not be in use.

Is there a risk of layout corruption or other reason not to actively develop a database in use?

The alternative seems to be to work on a copy and have users connect to the new database or work at night. (Note, I searched the forums and can't find this topic - sorry if it's commonly asked.)

[mr_vodka]

Although the ability to work on the files while it is being used is there, it is common practice to avoid doing it.

[parallax]

...it is common practice to avoid doing it.

Thanks John. I suspected as much. I'm reading up on suggestions in the other forums about how to implement version upgrades (I currently work at night or use scripts to import data to the new file.)

I would greatly appreciate it if any user can point me to a resource, thread or whitepaper that discusses common practices in implementing upgrade solutions for FM9.

Thanks in advance.