How to avoid xml errors?

[BlazeHoliday]

I'm using DPs 3.9 AL and everytime I edit an item set, item template or any xml
(\AIONEmulator\game\data\static_data)

I get errors when I start the gameserver.

I've tried small changes and big changes. I even tried simply setting a max damage of 48 on a weapon to 99 just to see if I used the same amount of digits as previous and errors happen. Is it just something you have to trial and error? I know you don't want to break the syntax but is there something that can be managed else where?

Should I edit source and recompile?

Any help would be appreciated.

[MentaL]