Err
Error handling function to return the error number of the last error
Syntax
`
Declare Function Err ( ) As Integer
`
Usage
`
result = Err
`
Return Value
After an error, returns the error code that occurred.
Description
`Err` can always be used, even if QB-like error handling is not enabled.
`Err` is reset by `Resume` and `Resume Next`.
NOTE: `Print Err` after an error occurred may end up printing `0`, because `Print` sets a new `Err` value when executed. To print an `Err` value it should be first copied to an auxiliary variable and print that one.
See Runtime Error Codes for a listing of runtime error numbers and their associated meaning.
Example
An example using QBasic style error handling (compile with -ex option)
`
'' Compile with -lang fblite or qb
#lang "fblite"
On Error Goto Error_Handler
Error 150
End
Error_Handler:
n = Err
Print "Error #"; n
Resume Next
`
An example using inline error handling
`
Dim a As String
Do
Line Input "Input filename: ", a
If a = "" Then End
Open a For Input As #1
Loop Until Err = 0
Print "File " & a & " opened successfully"
Close #1
`
Differences from QB

- Error numbers are not the same as in QB.

See also

- `On Error`
- Error Handling
- Runtime Error Codes