Differences

This shows you the differences between two versions of the page.

--- s800_daq_tools [2016/02/29 13:26]
pereira [Troubleshooting]
+++ s800_daq_tools [2016/02/29 14:44]
pereira [Troubleshooting]
@@ Line 89: / Line 89: @@
 ===== Troubleshooting =====
 There are several common reasons why the S800 DAQ may fails to start. The list below describes what to do to fix these problems.
+  * [[#No data sources defined]]
+  * [[#CCUSB and/or VMUSB claimed by existing programs]]
+  * [[#Manual rebooting]]
-  * [[No data sources defined]]
+==== Old processes still running ====
+Sometimes, particularly if the previous S800 DAQ session ended in an uncontrolled way, there may be old processes running (CCUSB and/or VMUSB and/or S800 event builder) that will prevent Readout GUI to begin a run. Whenever this happens (typically after clicking ''Begin''), the system sends an error message complaining about one of these processes still running. If you find yourself in this situation try:
 ==== No data sources defined ====
 When clicking ''Begin'' in the S800 Readout GUI, you get the error message: "No data sources are running so a run cannot be started". Very likely, the setting file **.settings.tcl** is missing. On a Linux session in u6pc5, type ''ls -lisa ~/stagearea''. You should see a hidden file **.settings.tcl**. If no, try the following:

S800 Documentation