Hi Tim,
The function is exiting out of this block of code (I added the printf("write failed\n") line).
****************************************************************
if (pscan->old_npts < pscan->npts) {
writeFailed |= !xdr_setpos(&xdrs, pscan->dims_offset);
Debug3(2, "saveData:writeScanRecInProgress:(%s) scan_dim=%d, dims_offset=%ld\n",
pscan->name, pscan->scan_dim, pscan->dims_offset);
if (writeFailed) {
printf("write failed\n");
goto cleanup;
}
lval = pscan->npts;
writeFailed |= !xdr_long(&xdrs, &lval);
}
*****************************************************************
Cheers,
Jay Steele
From: Tim Mooney [[email protected]]
Sent: Tuesday, November 02, 2010 3:47 PM
To: Jay Steele
Cc: [email protected]
Subject: Re: write failure occuring in writeScanRecInProgress function (after writing header) in saveData.c (sscan-2-6-6 module)
Jay,
The next thing saveData wants to do, after the last message you've shown,
is to call xdr_setpos(), and I'm pretty sure this will be its first call to xdr_setpos()
for the file. I'll guess xdr_pos() is returning an error (zero). Can you check to see
if this is true?
Tim Mooney
Jay Steele wrote:
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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Tim Mooney ([email protected]) (630)252-5417
Software Services Group (www.aps.anl.gov)
Advanced Photon Source, Argonne National Lab
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please notify me immediately by reply email, delete this email, and do not disclose its contents to anyone.
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