I have a BlackPoint workflow which use InfoPath form. It is working fine most of the time but sometimes after clicking Submit infopath says that there was an error. The form was submitted and a K2 task was created although the infopath returns an error and the window stays opened. It is like there is a timeout that is reached.
What can cause this problem?
You can try increasing the timeout in the Central Administration... In the Applications tab, in the "InfoPath Forms Services" section, you can increase your data timeout time. If it's not a timeout, you might be exceeding the maximum data received (the data would cut off at your limit and you would have an unterminated data stream which could cause errors). In that case, try increasing the Data connection response size.
goodluck
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