# Multiple Instances
**URL:** https://www.finalbuilder.com/forums/t/multiple-instances/273
**Category:** Discussion
**Created:** [December 1, 2006, 6:57am UTC](https://www.finalbuilder.com/forums/t/multiple-instances/273 "2006-12-01T06:57:42Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@deleted\_user](https://www.finalbuilder.com/forums/u/deleted_user)
#### Post date: [December 1, 2006, 6:57am UTC](https://www.finalbuilder.com/forums/t/multiple-instances/273/1 "2006-12-01T06:57:42Z")
This isn’t so much of a FinalBuilder question as it is a Windows question, but here goes:
How can I run different instances of FinalBuilder, each in it’s own environment space? I ask because my build process maps certain network drives to drive letters and then works from those drive letters. Obviously I can’t have both scripts trying to map to the same letter! How can I run them so that they both have their own instance of the drive letter? Is this even possible to do?
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### Author:  [@tate](https://www.finalbuilder.com/forums/u/tate)
#### Post date: [December 1, 2006, 9:19am UTC](https://www.finalbuilder.com/forums/t/multiple-instances/273/2 "2006-12-01T09:19:07Z")
Yes, you can run multiple instances of FB and they do have their own environment space, but a mapped drive is not part of that environment space. A mapped drive is global to the user session afaik. I suppose you could run a loop that maps a unique drive letter by looking for one not used, or maybe pass in the drive letter as a parameter?
.t8
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### Author:  [@deleted\_user](https://www.finalbuilder.com/forums/u/deleted_user)
#### Post date: [December 1, 2006, 9:48am UTC](https://www.finalbuilder.com/forums/t/multiple-instances/273/3 "2006-12-01T09:48:08Z")
No, can’t chage the drive letters, they are hard-coded into too many things. I wish they were variables instead of drive letters, but that decision was made long before I was around.
So I guess the only way would be to use different logons or use terminal services or something. Or I guess I could try running under multiple virtual servers, but that sounds like a licensing nightmare.
I’ll see what I can come up with, thanks.