$Fsterr: Difference between revisions
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<p>The <var>$FstErr</var> function returns a string containing the prefix and text of the first counting error message or request cancellation message received by the user. </p> | <p> | ||
<p>A null value is returned if no counting error or request cancellation message has been received since: | The <var>$FstErr</var> function returns a string containing the prefix and text of the first [[Introduction to User Language#Counting errors|counting error]] message or request cancellation message received by the user. </p> | ||
==Syntax== | |||
<p> | |||
This function takes no arguments. </p> | |||
==Usage notes== | |||
<ul> | |||
<li>A null value is returned if no counting error or request cancellation message has been received since: | |||
<ul> | <ul> | ||
<li>The beginning of the user's <var class="product">Model 204</var> session</li> | <li>The beginning of the user's <var class="product">Model 204</var> session</li> | ||
<li>The last call to the <var>[[$ErrClr]]</var> function</li> | <li>The last call to the <var>[[$ErrClr]]</var> function</li> | ||
<li>Processing a <var class="product">SOUL</var> <var>Open</var> statement</li> | <li>Processing a <var class="product">SOUL</var> <var>Open</var> statement</li> | ||
</li> | </ul></li> | ||
<li>The maximum length of the returned string is determined by the setting of the <var>[[ERRMSGL parameter|ERRMSGL]]</var> parameter. That parameter defaults to 80 which means a maximum of 79 characters are returned, but <var>ERRMSGL</var> can be set as high as 256 which means up to 255 characters would be returned. </li> | |||
<li><var>$FstErr</var> is not available for Host Language Interface applications. </li> | |||
<li>The <var>$FstErr</var> function requires an additional 88 bytes in the fixed portion of the server.</li> | |||
</ul> | </ul> | ||
==Example== | |||
<p>A sample <var>$FstErr</var> function with an <var>On Error</var> unit follows. To learn about <var>On Error</var> units, see [[Subroutines#ON units|ON units]].</p> | <p>A sample <var>$FstErr</var> function with an <var>On Error</var> unit follows. To learn about <var>On Error</var> units, see [[Subroutines#ON units|ON units]].</p> | ||
<p class="code">begin | <p class="code">begin | ||
| Line 30: | Line 42: | ||
end | end | ||
</p> | </p> | ||
==See also== | ==See also== | ||
<ul> | <ul> | ||
Revision as of 19:40, 2 September 2014
The $FstErr function returns a string containing the prefix and text of the first counting error message or request cancellation message received by the user.
Syntax
This function takes no arguments.
Usage notes
- A null value is returned if no counting error or request cancellation message has been received since:
- The beginning of the user's Model 204 session
- The last call to the $ErrClr function
- Processing a SOUL Open statement
- The maximum length of the returned string is determined by the setting of the ERRMSGL parameter. That parameter defaults to 80 which means a maximum of 79 characters are returned, but ERRMSGL can be set as high as 256 which means up to 255 characters would be returned.
- $FstErr is not available for Host Language Interface applications.
- The $FstErr function requires an additional 88 bytes in the fixed portion of the server.
Example
A sample $FstErr function with an On Error unit follows. To learn about On Error units, see ON units.
begin fsterr.proc: on error print 'The request is ending' print 'The first error message was:' print $fstErr end on get.recs: find all records for which agent = blake end find for each record in get.recs . . end for end
See also
- IFGERR IFAM function
- $Errmsg, which returns the most recent counting error message.
- The ERRMSGL parameter, which determines the length of errors returned by $Errmsg and $Fsterr.