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NT read/write errors over WAN

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5 replies

by iamtrackman

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A client s users of a 16bit FoxPro App over a WAN connection consistantly receive a NT sys. msg. of "the system was attempting to transfer file data from buffers to:
(\Mappeddrive:\servername\directoryname\filename on the other side of the WAN). The write operation failed and some of the data may have been written to the file" this is immediatly followed by a NT sys. msg. "Gereral system error 1104 has occureed. File read error". Note also that the software runs fine on andy LAN segment and Iwas unable to reproduce these error over our own WAN but then again we do not experience the traffic or use encrytion as our client does. Every Network and Software engineer I have spoke to agrees this sounds like a time out issue or lost thread butno one to date can pinpoint the annomally. My next direction for testing is to modify the registry values and/or have the carrier adjust the line buffering. Has anyone come across this and if so what was the solution?
Any suggestion will be considered, I am reaching for straws on this one

5 replies

by pdk

I have seen similar issues on our WAN try not to encrypt this application in your partners rulesetand log the traffic it generates then try to see what happens !

by shanghai sam

Hello, I am going to withdraw this question as my original determination proved to be true. The ISP had the buffering set too low on the T1 circuit. Ambient noise was causing the drops once the client traffic went above thirty percent. Once the buffering was modified by the carrier the application functioned correctly. Thank you all the same..

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