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Tcl Suppress Error


It's better practice to put separate "catch" commands around both the "puts" and the "close" commands to detect errors in either case and handle them appropriately.This is a different style of suppressing error messages from sql 5. After the first barrage of posts, i understood the mistake and updated the description. Anyway, thanks for your post. have a peek here

And guess what, it ends up in the hands of catch.. More info: I'm using a custom shell that takes a TCL file as an argument and runs it. 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 Getting Tcl/Tk Getting help Learning Tcl Tcl Dev Xchange About the Wiki Community Advocacy Conferences Chat, news, lists History Humor People Tcl websites Reference Companies Getting help Online books Online tutorials http://wiki.tcl.tk/catch

Tcl Catch Example

You can get subtler: proc puts args { if {[llength $args] == 1} { set msg [lindex $args 0] # here you can filter based on the content, or just ignore and it can be called from interactive prompt, then after all the necessary outputs, the return value is getting printed unnecessarily. stderr?

You just disqualified most of the answers. –Johannes Kuhn Apr 1 '13 at 17:42 1 the result of the set command is the new value. up vote 0 down vote favorite 1 In my TCL script I'm using several procedures that I don't have the source for. So for example I would like to run a procedure like so: my_proc $arg1 $arg2 $arg3 and suppress all it's messages. Tcl Error Command Suppress error message when my process finds no rows 8.

Suppressing error msgs Powered by phpBB Forum Software Board index » tcl All times are UTC Suppressing error msgs Suppressing error msgs Author Message Boris Bezla#1 / 2 Tcl Error Handling The caller of catch may then use this information, including values such as -code and -level in $optionsVarname, for its own purposes. So using the tcl prompt is part of your standard work procedure... –Roalt Apr 4 '13 at 7:32 @Kuhn: I've checked this with running it in either a shell Proving integral is zero TVS diode before or behind resistor How to suggest textbook improvement to author?

Can a PET 2001 be physically damaged from BASIC? Tcl Errorinfo Binary to decimal converter Declare Variable to use as placeholder text for tablenames, not using declare table type Why can't I create a Permissions Level? A more elegant approach that leverages Tcl's own built-in hooks is to use an execution trace to detect whether the command has been called (I'll just show the non-event-loop version here, What is Tk?

Tcl Error Handling

In those cases, I often find that it is most useful to use something that measures the size of the result, such as: set tmp [something_which_produces a_gigantic result]; string length $tmp Anxious about riding in traffic after 20 year absence from cycling Which planet does Leia represent in the New Republic? Tcl Catch Example set accum "" while {[gets stdin line] >= 0} { append accum $line "\n" if {[info complete $accum]} { if {[catch $accum msg]} { puts stderr $msg } elseif {$msg ne Tcl Try Catch Example asked 3 years ago viewed 1483 times active 3 years ago Get the weekly newsletter!

proc a {} { puts "hello" if { [info exist tcl_interactive] } { return {}; } else { return 34; } } share|improve this answer answered Apr 2 '13 at 13:44 navigate here no msgs? 12. For example, if an open call returns an error, the user could be prompted to provide another file name. If not, the error is placed in varName. Tcl Catch Exec

When a Tcl command or procedure encounters an error during its execution, the global variable errorInfo is set, and an error condition is generated. Generates a return exception condition. See Also editbreakcontinuereturnerrormagic nameserrorCodeerrorInfoTcl performance: catch vs. Check This Out What is meant by the phrase “Software can replace hardware”?

Any help is appreciated. Tcl Throw Error I >need to know how I can supress Error in TCL Script pop-up message box man 'catch' -- Software Engineer, Oregon R&D office: 541.683.7891 CADIX International, more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

How to detect the command is being executed The code above uses ![string match *TheSpecialCommand* $accum] to decide whether to throw away the command results, but this is very ugly.

share|improve this answer edited Apr 2 '13 at 8:47 answered Apr 1 '13 at 13:43 Donal Fellows 84.1k1294156 1 You can also write your own read-eval-print-loop (without the print part) it can be called from a script and there won't be any problem (as Bryan pointed out). The definitive method is seen as KBK's contribution to the exec page.LES: or should one rather follow advice given at exec and error information? Tcl Trap Quote:>I am a newbie in TCL/TK.

Is ok to have boxes of raw chicken stacked on top of each other Did millions of illegal immigrants vote in the 2016 USA election? Because Tcl stops execution of the code as soon as it encounters an error. Jeffrey Hobbs is a member of the Tcl Core Team and the release manager forTcl/Tk core. http://colinmeldrum.com/tcl-error/tcl-error-f5.html I want to read a file without displaying the contents on the screen.

The return value of catch is the status return of the Tcl interpreter after it executes script If there are no errors in script, this value is 0. If the Tcl shell is interactive (that is, its input and output streams are connected to a terminal), after executing each command, the string representation of the result value the command Tcl has no throw command, but still you can call it. Why do you want to disable it? –whjm Apr 1 '13 at 12:38 1 Why is this important?

Please think of the fact, that the executable is not maintained by us, it's a company external executable! Hi I am a newbie in TCL/TK. catch and background editOften a Tcl/Tk program invokes an external command, but needs the GUI to stay alive. Tcl defines the normal return code from script evaluation to be zero (0), or TCL_OK.