Call must be used with function names starting with "un." in the uninstall section
function, nsis, uninstallation
Solution
The functions that are used by the uninstaller must be prefixed with `un.`, and so do the macros.
Thus, if you are using a macro and want to be able to use it from both installer and uninstaller, you must insert it 2 times (one with and another without the `un.` prefix).
Adding or replacing the `!insertmacro "UpdateXml"` by `!insertmacro un.UpdateXml` at the begining of your script should fix the problem (provided that the `un.UpdateXml` macro is defined in the `xml.nsh`).
Problem
``` ... !include "nsDialogs.nsh" !include "MUI2.nsh" !include "LogicLib.nsh" !include "XML.nsh" !insertmacro "UpdateXml" ... !insertmacro MUI_UNPAGE_LICENSE "${NSISDIR}\Docs\Modern UI\License.txt" UninstPage custom un.PageReinstall !insertmacro MUI_UNPAGE_CONFIRM ... Function un.PageReinstall ... ${UpdateXml} "http://127.0.0.1/123.xml" "/XML/A" $321 ; line 232 ... FunctionEnd ``` NSIS log: !insertmacro: UpdateXmlCall Call must be used with function names starting with "un." in the uninstall section. Usage: Call function_name | [:label_name] Error in macro UpdateXmlCall on macroline 5 Error in script "G:\Basic.nsi" on line 232 -- aborting creation process What's wrong?