I suspect a recent update from Microsoft is to blame but I have multiple servers that screengrab was working on a few weeks ago that no longer works on. This is BOTH Windows 2008 and Windows 2003 servers. .jpg's are associated with IE on both.
The error message is:
The system cannot find the file specified, check the file association of .jpg files.
Upon further research, I found that this error is returned if the workstation is turned on but the user is logged out. Previously, screengrab returned a message saying there wasn't a logged in user. Now it reponds with the association message.
Current version of both Lansweeper and Screengrab.
Not that big of a deal now that I know what the message means but it's something to be looked at.