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Tcl/tk Error

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Rather than searching for errors in a .Rout file, it is nicer to see errors pop up as you are running the application. argument to examine the specific -code value, but in most cases that's more complicated than necessary, and I was hoping to keep the overall 'if structure' more or less in place. Not the answer you're looking for? And, when doing so to use the list command to make a well-formed command. http://colinmeldrum.com/tcl-error/tcl-error-f5.html

However, there are some platforms (DEC Alphas?) where "int" is 32 bits but "long" is 64 bits. There are other reasons to deprecate exec ls, incidentally. Chris has written a corrected version which accurately explains the semantics. Format of this article [Explain index.

Tcl Error Handling

puts "The 'X' binding now has the value '%X'." ... However, "0" is a synonym for "0x0". Synopsis edit error message ?info? ?code? open $MYFIFO {RDONLY NONBLOCK} It's even possible to fconfigure the channel back to a blocking mode, once the open has been achieved.

He has taught Tcl/Tk seminars in colleges and corporations around the world and writes regularly on Tcl/Tk for the developer community. share|improve this answer edited Oct 18 '10 at 6:42 answered Oct 18 '10 at 6:30 Nick HS 693412 Thanks a lot! They write something like button .button -text Button pack .button bind . {push "I hit 'Enter'."} This does not give the results they want, for "Enter" in the context of Tcl Throw Exception You don't say what OS you're using, so it's a little bit difficult to help you.

If the expression causes an error, then this error is displayed in a message box. Tcl Error Command What is the Maximum Type Depth? EXEC: exec doesn't use a shell. A coding like set number_of_lines $argv set filename /tmp/example set fp [open $filename w] for {set i 1} {$i <= $number_of_lines} {incr i} { puts $fp "This is line #$i." }

exec ls -l /bin does what Unix people want, but set cmd "ls -l /bin"; exec $cmd does not, but set cmd "ls -l /bin"; eval exec $cmd and even set Tcl Catch Example It's ENORMOUSLY helpful to hear from readers about whether and how this article benefits them. What are the downsides to multi-classing? Chris has also constructively criticized many of them.

Tcl Error Command

Then in a "try" block, you can test for the different types of error conditions separately and handle them in different ways. (My complaint about Java is that there seems to FORMAT: programmers coming from C want to use format and scan more than is necessary. Tcl Error Handling To quote Fox: "You can verify the source of this problem by issuing the following command at the R command prompt: system("ls -ld /usr/local /usr/local/lib /usr/local/lib/libtcl*") # ls: /usr/local/lib: Permission denied Tcl Throw Error TclRequire <- function(tclPkg) { library(tcltk2) res <- suppressWarnings(tclRequire(tclPkg)) if (is.logical(res) && res

In the first form, $var is evaluated once, and that same value is used on each iteration. http://colinmeldrum.com/tcl-error/tcl-error-out.html You have an out-dated version of X-Windows. BINDING: confusions in binding are so many and so characteristic that I might soon break them out into their own page. UPVAR: upvar takes a name, not a value. Tcl Error Code

When an exceptional return code is returned, $messageVarName contains the message corresponding to that exception.The standard return codes are 0 to 4, as defined for return, and also in tcl.h. If, for example, I define a command, ... Tom Tromey explains why. [Explain env, ...] %: "My formatting doesn't work"; "I'm trying to round my numbers using 'format', but instead of geting numbers I get like ".2f", the format Check This Out What's the consequence?

Results become happier when the lines bindtags .a {Radiobutton .all .a} bindtags .b {Radiobutton .all .b} are added, as Bryan Oakley explains. Tcl Return Error error $errMsg $savedInfo If the code argument is present, then its value is stored in the errorCode global variable. Similarly, when a command works interactively, but reports "invalid command ..." in batch, it's probably because of the following: when an interpreter does not recognize an invoked command, it attempts to

However, I think that you will find Tcl's substitution mechanism to be simple and predictable if you just remember two related rules: Tcl parses a command and makes substitutions in a

On another hand, this fault often is inconsequential, for many programs report the same result even if (unintentionally) coded, as in this example, to receive one apparent extra blank line at How do I make a global variable local? ..." proc my_command {} { global local_variable set local_variable something } my_command puts "$local_variable is OK." This usage is opposite what many coming Tcl interpreters behave slightly differently when run interactively. Tcl Warning It's easy to forget one of the middle elements.

If the info argument is present, it is used to initialize the -errorinfo return options and the first increment of unwind information will not be added by the Tcl interpreter. As usual, Tcl gives appropriate options and access, so it's not necessary to use the default: ... Join them; it only takes a minute: Sign up Error “.onLoad failed in loadNamespace() for 'tcltk'” up vote 9 down vote favorite I have a general question about how to effectively this contact form In the stage of running configure command I get the following error at the last stage.

INTEGERs: Tcl arithmetic is not precisely defined. Finally, note in all this that I've been constructing bindings with quoting punctuation. ENTER: those working with bindings for the first time frequently make a mistake when they first want to program an action for the "Enter" key. And guess what, it ends up in the hands of catch..

Each character is scanned exactly once.