Hi EPICS
tech-talk,
I'm
having a problem executing my first simple 1D scan here at XRadia. I
set up the scan as simply as I could - with one positioner and one data
source (SIS 3820 board with input to channel #9 from a signal
generator). I am using TPMAC records (e.g., bkgfix1pcs_scanrec_v3.db
and AssyGeneric_scanrec_v3.db to set up records) for the positioner. I
verified that the SIS 3820 record works to count the pulses from the
signal generator, and also that I can move the motor simply by setting
21:D3:BNP:XY:PX:RqsPos. I start the scan and the vxWorks terminal
reports the following (with debug_saveData =10, debug_saveDataMsg=10)
and keeps trying to write to the scan file without success. Attached is
a screen shot of the MEDM interface for the scan. I'm using
epics-3-14-11 with VxWorks and compiling with cygwin on windows-x86.
saveDataTask: MSG_SCAN_PXNV, ix=0,
val=2.000000
21:D3:BNP:scan1 MSG_SCAN_PXNV(2)= 0.000000
saveDataTask: MSG_SCAN_PXNV, ix=0, val=0.000000
21:D3:BNP:scan1 MSG_SCAN_PXNV(0)= 0.000000
saveDataTask: MSG_DESC, val=
MSG_DESC()= 0.000000
nb_scan_running=1
saveDataTask: MSG_SCAN_DATA, val=0
proc_scan_data(21:D3:BNP:scan1):entry:pmsg->val=0
scan started: 21:D3:BNP:scan1
Checking number of valid positioner
Checking number of valid detector
Checking number of valid trigger
Outermost scan
proc_scan_data(21:D3:BNP:scan1):New file
saveData: stat returned -1 for filename
'/data/Nov-1-2010/test_0008.mda'; errno=
3145730
saveData:writeScanRecInProgress: Opening file
'/data/Nov-1-2010/test_0008.mda'
saveData:writeScanRecInProgress: Writing file header
saveData:writeScanRecInProgress: scan_dim=1
saveData:writeScanRecInProgress:(21:D3:BNP:scan1) scan_dim=1,
dims_offset=0
saveData:writeScanRecInProgress: File Header written
saveData:writeScanRecInProgress: Writing per-scan header
saveData:writeScanRecInProgress: Save scan info
saveData:writeScanRecInProgress: Pos[0] info
saveData:writeScanRecInProgress: Det[0] info
saveData:writeScanRecInProgress: Trg[0] info
saveData:writeScanRecInProgress: Allocate space for Pos[0]
saveData:writeScanRecInProgress: Allocate space for Det[0]
saveData:writeScanRecInProgress:(21:D3:BNP:scan1) scan_dim=1,
dims_offset=0
From this output, I tracked the problem down to a write
failure in the writeScanRecInProgress function in saveData.c. This
occurs after the function writes out the file header and allocates
space for Pos[0] and Det[0].
I'm confused why there would be
a write failure at this point. Can anybody determine from this problem
what might be wrong with my setup to cause this problem?
Thanks,
Jay
Steele
XRadia
Corporation
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