#include <StringConstants.au3> ; to declare the Constants of StringRegExp
#include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate
Local $sRegex = "[Pp]alette.*?(?:No\.?|#)\s*(\w+)"
Local $sString = "1. Warehouse A, (Palette #91L41)" & @CRLF & _
"2. Warehouse B Palette No. 214" & @CRLF & _
"3. Warehouse Lot Storage C (Palette No. 9)" & @CRLF & _
"4. Store Location D of Palette (Palette #1)" & @CRLF & _
"5. Store Location E of Palette, Empty, lot #45"
Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYGLOBALFULLMATCH)
Local $aFullArray[0]
For $i = 0 To UBound($aArray) -1
_ArrayConcatenate($aFullArray, $aArray[$i])
Next
$aArray = $aFullArray
; Present the entire match result
_ArrayDisplay($aArray, "Result")
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm