The modem tells me that the modem's port is used by another application

limmontreefree
limmontreefree used Ask the Experts™
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Hello I have a serial modem attached to com1, when I try the modem it tells that the port is used by another application.

In the devices administrator I Can see the port Com1.

How Can I know with application is using the com1 port?

Thanks
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