Progress Openedge Error Handling
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a block-making construct like the try statement. ABL blocks have something more than simple try blocks. Because ABL is a language with database semantics, all ABL blocks are undoable blocks that protect the database by undoing work when a block fails. This ability means you have more options for successfully resuming execution after an error. For example, you could retry a block after an error.All blocks have implicit error handling of some type, except for the simple DO block (a DO ... END block without transaction or error handling options). Explicit error handling for blocks http://knowledgebase.progress.com/articles/Article/P173073 is provided by an ON ERROR phrase and its many options. Default error handling is provided by an implicit ON ERROR phrase. Implicit and explicit ON ERROR phrases make up, in brief, traditional error handling.ABL adds built-in classes to represent errors as objects and a CATCH statement. These changes provide the basic mechanics of structured error handling in ABL. Here is a simple example:DO https://documentation.progress.com/output/ua/OpenEdge_latest/dverr/what-is-abl-structured-error-handling-3f.html ON ERROR UNDO, RETURN: FIND FIRST Customer WHERE CustNum = 1000. CATCH eSystemError AS Progress.Lang.SysError: MESSAGE "Not a valid customer number.".UNDO, THROW eSystemError.END CATCH.END. /* DO */The explicit ON ERROR phrase defines error handling for the block. In traditional error handling, the RETURN action occurs if any error is raised within the block. In structured error handling, the RETURN action occurs for any error that is not explicitly handled by a CATCH block. Since the FIND statement fails and raises a system error, the CATCH block executes and the MESSAGE statement displays a customer error message in the message area of the procedure window. However, the CATCH block concludes with the UNDO, THROW statement that directs the block enclosing the DO block to handle the eSystemError object. The enclosing block is the main procedure block, which by default uses traditional error handling. So, the default error message will also appear in a message block when the error object is thrown to the main procedure block. This demonstrates how error handling moves seamlessly between traditional and structured error handling.Copyright © 2015 Progress Software Corporation. All rights Reserved. Progress® OpenEdge® Release 11.6
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of http://stackoverflow.com/questions/23127756/try-catch-in-progress this site About Us Learn more about Stack Overflow the company Business Learn http://www.progresstalk.com/threads/try-catch.120155/ more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up error handling try catch in Progress up vote 5 down vote favorite Is there a method that is similar to the try catch in php? try { ... } catch (Exception $e) { ... } I already use the blocks of this type: DO ON ERROR UNDO ... but I wonder if there is another way to do it. Thanks. progress-4gl share|improve this question edited progress openedge error Apr 17 '14 at 8:04 Bathsheba 85.7k1193162 asked Apr 17 '14 at 8:03 doydoy44 4,44431037 add a comment| 1 Answer 1 active oldest votes up vote 3 down vote accepted Yes. Since version 11.2 there's the BLOCK-LEVEL ON ERROR UNDO, THROW. statement that changes the default behavior of your entire program. CATCH has been around longer - since version 10.1C. /* Must be first line of program */ BLOCK-LEVEL ON ERROR UNDO, THROW. DEFINE VARIABLE i AS INTEGER NO-UNDO. i = INTEGER("Hello"). CATCH err AS Progress.Lang.Error: MESSAGE "Error: " err:GetMessage(1) VIEW-AS ALERT-BOX ERROR. END. Older style program with do on error like your example, taken from the Progress KnowledgeBase. DO ON ERROR UNDO, THROW: /* The following line raises error (138) which is diverted to a Progress.Lang.SysError object and thrown to the main block. */ FIND Customer 1000. END. CATCH eAnyError AS Progress.Lang.Error: MESSAGE "Error Number:~t" eAnyError:GetMessageNum(1) "~n" "Error Text:~t" eAnyError:GetMessage(1) VIEW-AS ALERT-BOX BUTTONS OK TITLE "Error processing in the CATCH for mainprocedure block". END CATCH. Complete description of BLOCK-LEVEL ON ERROR UNDO, THROW From the manual: Syntax BLOCK-LEVEL ON ERROR UNDO, THROW. This statement affects the f
enzo, Nov 1, 2011. enzo New Member Hello, this code: DEFINE VARIABLE hc AS HANDLE NO-UNDO. RUN "libcont" PERSISTENT SET hc NO-ERROR. Show the error : ** CRC for index