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108 lines
7.1 KiB
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<meta name="DC.Title" content="Typical errors when using the Open Query File (OPNQRYF) command" />
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<title>Typical errors when using the Open Query File (OPNQRYF) command</title>
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<body id="rbafoopnerr"><a name="rbafoopnerr"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Typical errors when using the Open Query File (OPNQRYF) command</h1>
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<div><p>You must specify several functions correctly for the Open Query
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File (OPNQRYF) command and your program to get the correct results.</p>
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<div class="section"><p>The Display Job (DSPJOB) command is your most useful tool if problems
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occur. This command supports both the open files option and the file overrides
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option. You can look at both options if you are having problems.</p>
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<div class="p">Listed
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here are the most common problems you might encounter when using
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the OPNQRYF command and the ways to correct them: <ul><li>Shared open data path (ODP). The OPNQRYF command operates through a shared
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ODP. In order for the file to process correctly, the member must be opened
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for a shared ODP. If you are having problems, use the open files option on
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the DSPJOB command to determine if the member is opened and has a shared ODP. <div class="p">There
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are normally two reasons that the file is not open: <ul><li>The member to be processed must be SHARE(*YES). Either use an Override
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with Database File (OVRDBF) command or permanently change the member.</li>
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<li>The file is closed. You have run the OPNQRYF command with the OPNSCOPE(*ACTGRPDFN)
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or TYPE(*NORMAL) parameter option from a program that was running in the default
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activation group at a higher level in the call stack than the program that
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is getting an error message or that is running the Reclaim Resources (RCLRSC)
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command. This closes the open query file because it was opened from a program
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at a higher level in the call stack than the program that ran the RCLRSC command.
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If the open query file was closed, you must run the OPNQRYF command again.
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Note that when using the OPNQRYF command with the TYPE(*NORMAL) parameter
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option on releases prior to Version 2 Release 3, the open query file is closed
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even if it was opened from the same program that reclaims the resources.</li>
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</ul>
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</div>
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</li>
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<li>Level check. Level checking is normally used because it ensures that your
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program is running against the same record format that the program was compiled
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with. If you are experiencing level check problems, it is normally because
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of one of the following reasons: <ul><li>The record format was changed since the program was created. Creating
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the program again should correct the problem.</li>
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<li>An override is directing the program to an incorrect file. Use the file
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overrides option on the DSPJOB command to ensure that the overrides are correctly
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specified.</li>
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<li>The FORMAT parameter is needed but is either not specified or incorrectly
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specified. When a file is processed with the FORMAT parameter, you must ensure: <ul><li>The OVRDBF command, used with the TOFILE parameter, describes the first
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file on the FILE parameter of the OPNQRYF command.</li>
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<li>The FORMAT parameter identifies the file that contains the format used
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to create the program.</li>
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</ul>
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</li>
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<li>The FORMAT parameter is used to process a format from a different file
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(for example, for group processing), but SHARE(*YES) was not requested on
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the OVRDBF command.</li>
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</ul>
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</li>
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<li>The file to be processed is at end of file. The normal use of the OPNQRYF
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command is to process a file sequentially where you can only process the file
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once. At that point, the position of the file is at the end of the file and
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you will not receive any records if you attempt to process it again. To process
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the file again from the start, you must either run the OPNQRYF command again
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or reposition the file before processing. You can reposition the file by using
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the Position Database File (POSDBF) command, or through a high-level language
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program statement.</li>
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<li>No records exist. This can be caused when you use the FORMAT keyword,
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but do not specify the OVRDBF command.</li>
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<li>Syntax errors. The system found an error in the specification of the OPNQRYF
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command.</li>
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<li>Operation not valid. The definition of the query does not include the
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KEYFLD parameter, but the high-level language program attempts to read the
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query file using a key field.</li>
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<li>Get option not valid. The high-level language program attempted to read
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a record or set a record position before the current record position, and
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the query file used either the group by option, the unique key option, or
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the distinct option on the SQL statement.</li>
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</ul>
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</div>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafoopnqf.htm" title="The Open Query File (OPNQRYF) command is a control language (CL) command that allows you to perform many data processing functions on database files. These topics discuss how to create a query using the OPNQRYF command, how to specify parameters for its major functions, and how to use it with your high-level language program.">Use Open Query File (OPNQRYF) command</a></div>
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</div>
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</div>
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</body>
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</html>
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