Each namespace can have an application error log, which records errors encountered when running code in that namespace. Some system code automatically writes to this log, and your code can do so as well.
Using Management Portal to View Application Error Logs
From the Management Portal, select System Operation, then System Logs, then Application Error Log. This displays the Namespace list of those namespaces that have application error logs. You can use the header to sort the list.
Select Dates for a namespace to display those dates for which there are application error logs, and the number of errors recorded for that date. You can use the headers to sort the list. You can use Filter to match a string to the Date and Quantity values.
Select Errors for a date to display the errors for that date. Error # integers are assigned to errors in chronological order. Error # *COM is a user comment applied to all errors for that date. You can use the headers to sort the list. You can use Filter to match a string.
Select Details for an error to open an Error Details window that displays state information at the time of the error including special variables values and Stacks details. You can specify a user comment for an individual error.
The Namespaces, Dates, and Errors listings include checkboxes that allow you to delete the error log for the corresponding error or errors. Check what you wish to delete, then select the Delete button.
Using ^%ERN to View Application Error Logs
The ^%ERN utility examines application errors and lets you see all errors logged for the current namespace. This is an alternative to using the Management Portal.
Take the following steps to use the ^%ERN utility:
At the Terminal prompt, DO ^%ERN. The name of the utility is case-sensitive; responses to prompts within the utility are not case-sensitive.
At any prompt you may enter ? to list syntax options for the prompt, or ?L to list all of the defined values. You may use the Enter key to exit to the previous level.
At the For Date: prompt, enter ?L to see a list of all the dates when errors occurred.
Then at the same prompt, enter one of those dates (in the format mm/dd/yyyy); if you omit the year, the current year is assumed. The routine then displays the date and the number of errors logged for that date. Alternative, you can retrieve lists of errors from this prompt using the following syntax:
?L lists all dates on which errors occurred, most recent first, with the number of errors logged. The (T) column indicates how many days ago, with (T) = today and (T-7) = seven days ago. If a user comment is defined for all of the day’s errors, it is shown in square brackets. After listing, it re-displays the For Date: prompt. You can enter a date or T-n.
[text lists all errors that contain the substring text. <text lists all errors that contain the substring text in the error name component. ^text lists all errors that contain the substring text in the error location component. After listing, it re-displays the For Date: prompt. Enter a date.
Error: at this prompt supply the integer number for the error you want to examine: 1 for the first error of the day, 2 for the second, and so on. Or enter a question mark (?) for a list of available responses. The utility displays the following information about the error: the Error Name, Error Location, time, system variable values, and the line of code executed at the time of the error.
You can specify an * at the Error: prompt for comments. * displays the current user-specified comment applied to all of the errors of that day. It then prompts you to supply a new comment to replace the existing comment for all of these errors.
Variable: at this prompt you can specify numerous options for information about variables. If you specify the name of a local variable (unsubscipted or subscripted), ^%ERN returns the stack level and value of that variable (if defined), and all its descendent nodes. You cannot specify a global variable, process-private variable, or special system variable.
You may enter ? to list other syntax options for the Variable: prompt.
*A: when specified at the Variable: prompt, displays the Device: prompt; press Return to display results on the current Terminal device.
*V: when specified at the Variable: prompt, displays the Variable(s): prompt. At this prompt specify an unsubscripted local variable or a comma-separated list of unsubscripted local variables; subscripted variables are rejected. ^%ERN then displays the Device: prompt; press Return to display results on the current Terminal device. ^%ERN returns the value of each specified variable (if defined) and all its descendent nodes.
*L: when specified at the Variable: prompt, loads the variables into the current partition. It loads all private variables (as public) and then all public variables that don't conflict with the loaded private variables.