---
bc-version: [20..]
domain: privacy
keywords: [getlasterrortext, error, strsubstno, telemetry, customer-data, attachment]
technologies: [al]
countries: [w1]
application-area: [all]
---

# Treat `GetLastErrorText()` as potential customer content

## Description

`GetLastErrorText()` can contain customer content such as field values, record keys, and file names. When it is passed as a substitution value to an `Error` whose first argument is a `Label` or `TextConst`, the label supplies the Error method trace telemetry message. If `StrSubstNo` or concatenation makes `GetLastErrorText()` part of the first argument, the actual dynamic string is not emitted as that telemetry message; telemetry uses generic guidance instead.

## Best Practice

Use a generic label when the user does not need the underlying detail. If showing the detail is appropriate, put `%1` in a label and pass `GetLastErrorText()` as a separate argument. This preserves a useful static telemetry message while keeping the dynamic value out of the telemetry message field.

See sample: `getlasterrortext-customer-content-in-errors.good.al`.

## Anti Pattern

`Error(StrSubstNo(AttachmentFailedErr, GetLastErrorText(true)))` or `Error(AttachmentPrefixErr + GetLastErrorText(true))`. Both lose the static first argument and trigger AA0231; neither causes the composed text to be logged verbatim as the Error telemetry message.

See sample: `getlasterrortext-customer-content-in-errors.bad.al`.