String Matching

Hey everyone,?

? I have been having an issue trying to find a specific string of text in a log of system messages. ?I have tried to use pmatch, match, and some regular expressions but all to no avail. ?

I have a matrix / data.frame (either one, the file outputs a tens of thousands of rows with a single column) of strings in the following format with different items after INFO:
?"09:11:57.259 - Assay File Processing Thread - INFO - SolenoidCycleMessage: Addr = 0x03 "

as an example I would like to match "SolenoidCycleMessage"
searchString<-"SolenoidCycleMessage"
matchString<-"09:11:57.259 - Assay File Processing Thread - INFO - SolenoidCycleMessage: Addr = 0x03"

pmatch(searchString, matchString)

[1] NA

match(searchString, matchString)

[1] NA

match(matchString, searchString)

[1] NA

grep(searchString, matchString, ignore.case=FALSE)

[1] 1

df<-as.data.frame(c(matchString, string1, string2))
df

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?c(matchString, string1, string2)
1 09:11:57.259 - Assay File Processing Thread - INFO - SolenoidCycleMessage: Addr = 0x03?
2 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?23:12:43.22 - Test
3 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?test

grep(searchString, df, ignore.case=FALSE)

integer(0)

grep(searchString, c(matchString, string1, string2), ignore.case=FALSE)

[1] 1

Doe anyone have some input that could help?

Thanks,?
Kevin