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Viewing User Profile for: peterjslater
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I am note sure what is generating the outputdebug, I thought it might be the iqfeed client actually.

I have not had this problem with the socket control for other projects.


I am a 3rd party developer using ipworks ( TCP/IP Delphi component to connect to IQFeed 4.8 ( using sockets on localhost (

I am making a request for history to the IQFeed client (HD,... ) and once the history is received, I disconnect the socket and free the socket connection.

PROBLEM: After I free the socket (IPWorks Socket) in our program, IQFeed outputs the following in the outputdebug log.

HEAP: Free Heap block 1da81da0 modified at 1da81e2c after it was freed
Ignoring Non-user Breakpoint at $76FD04E5.

If I do not free the socket (and cause a memory leak) the error does not occur.

It appears that IQFeed is modifying some memory after its been free'd.

Any thoughts ?

p.s. When this error occurs we sometime get random memory problems in the program as the memory that is over written is sometimes being used by something else.

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