# The underlying connection was closed:

**URL:** <https://techcommunity.softwareag.com/t/the-underlying-connection-was-closed/59414>\
**Category:** Forum\
**Tags:** Mainframe-Integration, EntireX\
**Created:** [August 21, 2005, 11:00pm UTC](https://techcommunity.softwareag.com/t/the-underlying-connection-was-closed/59414 "2005-08-21T23:00:02Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![fischerj](https://avatars.discourse-cdn.com/v4/letter/f/e274bd/32.png) [@fischerj](https://techcommunity.softwareag.com/u/fischerj)\
**Post date:** [August 21, 2005, 11:00pm UTC](https://techcommunity.softwareag.com/t/the-underlying-connection-was-closed/59414/1 "2005-08-21T23:00:02Z")

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The underlying connection was closed: An unexpected error occurred on a receive

We are using a Windows Application to request data from a mainframe using EntireX. The EntireX DLLs exist on a Windows 2003 server.

The error occurs when a load is put on the system. About 5000 requests for data from the mainframe within a minute or so period

The error message sounds like it timed-out when waiting for a response from the mainframe.

Has anyone else seen this message?

Thanks for help with this issue.

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**Author:** ![Douglas\_Kelly](https://sea1.discourse-cdn.com/techcommunity/user_avatar/techcommunity.softwareag.com/douglas_kelly/32/102_2.png) [@Douglas\_Kelly](https://techcommunity.softwareag.com/u/Douglas_Kelly)\
**Post date:** [August 22, 2005, 7:10pm UTC](https://techcommunity.softwareag.com/t/the-underlying-connection-was-closed/59414/2 "2005-08-22T19:10:04Z")

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Is there an error number associated with the message?

What versions of EntireX Communicator are in use on the client (Windows 2003 Server) and server (the mainframe). Is ACI being used or RPC? If RPC, what wrappers are being used? Have you run a stublog trace (search the documentation for ETB\_STUBLOG)? What is hosting the calls on the client side - IIS, Apache, .Net/ASPX, etc?

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**Author:** ![system](https://global.discourse-cdn.com/techcommunity/original/3X/c/d/cd19967bb605d28a72d77eb83a1cae22f3df2eb8.svg) [@system](https://techcommunity.softwareag.com/u/system)\
**Post date:** [April 2, 2021, 2:39pm UTC](https://techcommunity.softwareag.com/t/the-underlying-connection-was-closed/59414/3 "2021-04-02T14:39:49Z")

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