Error Opening Tab in Designer

Hi,

In version 7.0 of Appian, often I have problems when I try to open a tab in the dessiner application, at the same moment I have this error message in server.log but If I retry to open the tab in the dessiner application immediately after the second time is ok.

2016-02-17 16:24:05,247 ERROR [org.jgroups.blocks.ConnectionTable] (ReceiverThread) failed sending data to 10.220.210.27:10200: java.net.SocketException: Socket closed
2016-02-17 16:24:27,285 INFO [STDOUT] (Thread-30) 2016-02-17 16:24:27,285 [Thread-30] ERROR com.appiancorp.core.timer.timers.TransientTopicHeartbeat - No acknowledgement from TransientTopic, forcing rules cache to be cleared now.
2016-02-17 16:25:05,705 INFO [STDOUT] (ajp-10.220.154.123-9409-11) 2016-02-17 16:25:05,703 [ajp-10.220.154.123-9409-11] ERROR com.appiancorp.common.struts.BaseAction - Error executing action: null
java.lang.NullPointerException

Attaching a screen shoot of the error message.

Than...

appian.docx

OriginalPostID-195521

OriginalPostID-195521