R 3.4.3 OS X Colleagues I have a 20K line script in which I encounter an unexpected problem. If the script detects presence of a particular file USERCODE.txt, it executes: source(?USERCODE.txt?) If that file is not present, the script executes without a problem. There might be syntax errors in USERCODE.txt; therefore, the code above is embedded in a try command: try(source(?USERCODE.txt", local=T), silent=T) followed by: ERRORMESSAGE <- geterrmessage() For unclear reasons, an earlier command is yielding an error message: unused argument (\"\\n\") Despite identifying the exact source of that error, I can?t fix it (and it is of no consequence). Ideally, I would like to clear out the pre-existing error message immediately before the ?try? command (or perhaps at that particular location where it is being created) ? but I can?t figure out how to do so. Any suggestions would be welcome. Dennis Dennis Fisher MD P < (The "P Less Than" Company) Phone / Fax: 1-866-PLessThan (1-866-753-7784) www.PLessThan.com
Only the default error handler puts the error message in a buffer where it can be retrieved with geterrmessage. try() replaces the default error handler. Either look at the value returned by try() or use tryCatch with conditionMessage. Best, luke On Thu, 22 Feb 2018, Dennis Fisher wrote:> R 3.4.3 > OS X > > Colleagues > > I have a 20K line script in which I encounter an unexpected problem. > > If the script detects presence of a particular file USERCODE.txt, it executes: > source(?USERCODE.txt?) > If that file is not present, the script executes without a problem. > > There might be syntax errors in USERCODE.txt; therefore, the code above is embedded in a try command: > try(source(?USERCODE.txt", local=T), silent=T) > followed by: > ERRORMESSAGE <- geterrmessage() > > For unclear reasons, an earlier command is yielding an error message: > unused argument (\"\\n\") > Despite identifying the exact source of that error, I can?t fix it (and it is of no consequence). > > Ideally, I would like to clear out the pre-existing error message immediately before the ?try? command (or perhaps at that particular location where it is being created) ? but I can?t figure out how to do so. > > Any suggestions would be welcome. > > Dennis > > Dennis Fisher MD > P < (The "P Less Than" Company) > Phone / Fax: 1-866-PLessThan (1-866-753-7784) > www.PLessThan.com > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >-- Luke Tierney Ralph E. Wareham Professor of Mathematical Sciences University of Iowa Phone: 319-335-3386 Department of Statistics and Fax: 319-335-3017 Actuarial Science 241 Schaeffer Hall email: luke-tierney at uiowa.edu Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu
Luke Thanks ? I revised the code to: ERRORMESSAGE <- try(source(USERSCRIPTFILE, local=T), silent=T) print(ERRORMESSAGE) now returns: $value [1] 0 $visible [1] FALSE Not clear what to make of that. Dennis Dennis Fisher MD P < (The "P Less Than" Company) Phone / Fax: 1-866-PLessThan (1-866-753-7784) www.PLessThan.com> On Feb 22, 2018, at 12:45 PM, luke-tierney at uiowa.edu wrote: > > Only the default error handler puts the error message in a buffer > where it can be retrieved with geterrmessage. try() replaces the > default error handler. Either look at the value returned by try() or > use tryCatch with conditionMessage. > > Best, > > luke > > On Thu, 22 Feb 2018, Dennis Fisher wrote: > >> R 3.4.3 >> OS X >> >> Colleagues >> >> I have a 20K line script in which I encounter an unexpected problem. >> >> If the script detects presence of a particular file USERCODE.txt, it executes: >> source(?USERCODE.txt?) >> If that file is not present, the script executes without a problem. >> >> There might be syntax errors in USERCODE.txt; therefore, the code above is embedded in a try command: >> try(source(?USERCODE.txt", local=T), silent=T) >> followed by: >> ERRORMESSAGE <- geterrmessage() >> >> For unclear reasons, an earlier command is yielding an error message: >> unused argument (\"\\n\") >> Despite identifying the exact source of that error, I can?t fix it (and it is of no consequence). >> >> Ideally, I would like to clear out the pre-existing error message immediately before the ?try? command (or perhaps at that particular location where it is being created) ? but I can?t figure out how to do so. >> >> Any suggestions would be welcome. >> >> Dennis >> >> Dennis Fisher MD >> P < (The "P Less Than" Company) >> Phone / Fax: 1-866-PLessThan (1-866-753-7784) >> www.PLessThan.com >> >> ______________________________________________ >> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> > > -- > Luke Tierney > Ralph E. Wareham Professor of Mathematical Sciences > University of Iowa Phone: 319-335-3386 > Department of Statistics and Fax: 319-335-3017 > Actuarial Science > 241 Schaeffer Hall email: luke-tierney at uiowa.edu > Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu