From what I understand, neither Excel nor the other Office components are
not supported to run in a server environment. Doesn't mean you can't, but
it's not design for it. I can't find a link at the moment to back that up at
the moment, so I may be mistaken.
I suppose the limit of instances would be determined by memory:
http://www.decisionmodels.com/memlimitsc.htm
You would need to take of instance not closing as expected.

NickHK

"Stanley" wrote in message
...
Hi,

i have created a web application which opens an excel sheet, enters some
data, calculates the data and retrieve the outcome of the calculation.
This
application will be used by lots of people. Now i have heared that not too
many excel processes can be opened on the server (about 5). What is true
about this? Will this be a problem for me?

Thanks,

Stanley