DTN IQFeed, DTN.IQ, DTN ProphetX Support Forums

Join the 80,000 other DTN customers who enjoy the fastest, most reliable data available. There is no better value than DTN!

(Move your cursor to this area to pause scrolling)

"DTN has never given me problems. It is incredibly stable. In fact I've occasionally lost the data feed from Interactive Brokers, but still been able to trade because I'm getting good data from DTN." - Comment from Leighton

"This beats the pants off CQG, I am definitely switching to the ProphetX 3.0!" - Comment from Stephen

"I would just like to say that IQFeed version 4 is running very well and I am very happy with its performance. I would also like to extend a big thanks for the fast and efficient help that I always receive. My questions and concerns are always addressed promptly. Way to go!" - Comment from Josh in CO.

"I am keeping IQFeed, much better reliabilty than *******. I may refer a few other people in the office to switch as well." - Comment from Don

"IQ feed works very well, does not have all of the normal interruptions I have grown used to on *******" - Comment from Mark

"Thanks for all of your help. Great customer service deserves to be recognized which one the reasons I've been a customer of DTN for over 10 years!" - Comment from Stuart

"I am very happy I changed. I love the product, but more so I am thrilled with Tech Support. You are knowledgeable, polite, pleasant and professional." - Comment from Pat

"My broker in Davenport suggested I give you a try as he uses your service and says its the best." - Comment from Bill via RT Chat

"I use IQ Feed, Great stuff as far as data analysis information, storage and retrieval is concerned." - Comment from Public Forum

"IQ feed is brilliant. The support is mind-bending. What service!" - Comment from Public Forum Post

Home

Recent Posts

Information on DTN's Industries:
DTN Oil & Gas | DTN Trading | DTN Agriculture | DTN Weather

DTN.IQ/IQFeed on Twitter
DTN News and Analysis on Twitter

»Forums Index »Archive (2017 and earlier) »DTN.IQ Client Software Support »V4 Crashes

Author	Topic: V4 Crashes (3 messages, Page 1 of 1)
nexus -Interested User- Posts: 2 Joined: Dec 3, 2005 Just Do It	Posted: Dec 3, 2005 12:27 PM Msg. 1 of 3 Hi there, Since I upgraded to V4 I am experiencing periodic IQConnect crashes. I am pretty clueless about what could be causing it due the lack of debug information. Here is the test cycle I was executing: 1. Application startup 2. Connect IQFeed 3. Request historic information for 175 symbols 4. Receive and process historic information for each symbol 5. Subscribe for streaming the same 175 symbols 6. Let it run 24 hours x 5 days Unfortunately, the IQConnect crash is guaranteed to happen on the first three hours after all historic data is received. Because the crash is a 'hard' windows crash that invokes the 'this program executed an illegal operation' dialog, my application cannot recover from it until someone press the 'close application' button in the dialog. Any ideas about what is going on? Is there anyway I can get IQConnect to spit debug information? Thanks a lot!
DTN_Jay_Froscheiser -VP, Product Operations- Posts: 1746 Joined: May 3, 2004 DTN IQFeed/DTN.IQ/DTN NxCore	Posted: Dec 4, 2005 07:14 PM Msg. 2 of 3 I assume the crash occurs when using your internally developed software? There are a couple things to check. First, make sure you read all of the release notes from 2.3 through 4.0 to ensure you took into account any changes. There is a documented memory problem in 4.0 using sockets to request numerous history requests. We hope to have a new build available shortly that fixes it. Take a look at the 4.0 documenation regarding the registry settings to change to turn on logging in IQFeed. That may help provide some insight as to where it is crashing. Also, is the crash in IQFeed/IQConnect or in your software? If this is on your own software, send it to developer support via email and we can check to see where it may be crashing. Jay Froscheiser DTN - Trading Markets
nexus -Interested User- Posts: 2 Joined: Dec 3, 2005 Just Do It	Posted: Dec 8, 2005 01:50 AM Msg. 3 of 3 Hi Jay, > I assume the crash occurs when using your internally developed software? Yes, that is correct. > There is a documented memory problem in 4.0 using sockets to request numerous history requests. That could be related - I am using using sockets to communicate with IQFeed. > Take a look at the 4.0 documenation regarding the registry settings to change to turn on logging in IQFeed. Ok, I will give it a try and get back to you if something comes up :) > Also, is the crash in IQFeed/IQConnect or in your software? The crash is definitely in IQConnect. After running for a few hours, Windows say 'IQConnect.exe performed a illegal operation and must be closed'. Once I click 'close' to terminate IQConnect, my application recovers normally from disconnection, IQConnect is reinstantiated and everything is fine again. Thanks a lot! :)