It seems that your program is loosing the connection to the file server after some time. I would check the following:
* first cancel all screen savers in both the client and the server
* if this was not the problem, check your network cards in the client and servers. Also, maybe you have some network settings that detect idle time or something...

HTH
Jaime

>Hi,
>I have a VFP written program that will access data from server. I faced a problem that, my program will hang if it have idle for certain period of time. My program does't have any background processing or timer. What do you think it cause my program hang?
>Do you think VFP may lost connection with the file server when the program idle for a period of time??
>
>This is another situation:
>
>My program USE item table once form.init(). User may scan barcode, and my program search the barcode from item table. Once user want to make payment, my program will USE creditcard table to retrieve all acceptable credit card records. VFP show me "alias creditcard is not found!". I never change the path ot directory in my program. How come it fail to get the file? If I close my program and do the same thing again, it work fine.
>
>Pls advise
>
>Thank you