Unable to process converted Waters UPLC TOFMS data

February 16, 2013, 07:12:42 PM

Dear All,
I am learning to use xcms for my work.
I have converted my Waters .RAW UPLC TOFMS data to mzXML data format by TPP. But when I tried to run xcmsSet() function with any of the mzXML data files, I was informed that:
xcmsRaw(files, profmethod = profmethod, profparam = profparam, :
Time for scan 1690 (1199.81) greater than scan 1691 (2.36)
And that:
In readChar(filename, 1024) : in non-UTF-8 MBCS environment, can read only bytes (translated from Chinese)
I tried to find answer by reading the R documentations for xcms and the article "LC/MS Preprocessing and Analysis with xcms", but still can not get information which makes me understand or solve the problem.

I tried xset <- xcmsSet(method="centWave") but get same result.

Re: Unable to process converted Waters UPLC TOFMS data

Reply #1 – February 17, 2013, 04:28:51 AM

Please see here: viewtopic.php?f=25&t=191&p=717

Other important info: viewtopic.php?f=26&t=359