The network connection was lost for the file or the file was modified by another process

Question

the above titled error quit my ID this is very stratnge problem for work please tel me how can i fix the problem i insert the snapshot also for this problem
please help me to fix this problem thank you

Answer 1

I assume that you mean home computer and not a hope computer?!?   
Given that you are not on a network or assume you mean at least the file(s) you are working on are not network-based, one other possibility comes to mind.
Are your documents on an external hard drive, connected by either USB or IEEE1394 (Firewire) connections? If so, such drives are sometimes configured to go into “sleep mode” after a certain amount of time of inactivity where that inactivity time may range from a few minutes to hours. A “sleep mode” essentially keeps the disk drive's controller electronics alive, but powers down the rotating disk completely. When you attempt to subsequently access such a drive again, the drive exits the sleep mode and the rotating disk is restarted. Depending upon the disk model, age, and condition of the disk drive, such start-up can take upwards of 20 to 30 seconds in the worst case (I've personally seen this!). What may be happening is that the underlying disk device driver or the operating system may report this condition back to the application (in this case InDesign) as a failed or timed-out operation. InDesign doesn't know whether a “disk operation” is to a local disk drive or a network drive and as such, could yield a message about network failure.
Two notes: (1) Internal disk drives also can have a sleep mode as part of a “energy saver” configuration and (2) Disk drives with a sleep mode can also be configured to never go into sleep mode.
My advise would be to check you computer's energy saving settings to see if disk drives are shut down by the operating system during a certain period of inactivity. If so, disable that. If not and especially if you are using an external drive, the disk manufacturer, such as Seagate, Western Digital, etc., typically have stand alone utilities for low level disk formatting, diagnostics, and also for setting of disk sleep modes.
Let us know if this is what may be behind your problems.
          - Dov