After doing some more tests i come to conclusion that from the moment you see the pdf on the screen and then close it immediately it take sometimes 10 seconds before it executes the next statement, when i leave the pdf a few seconds open on the screen and then close it the next statement will be executed almost immediately !

[dany060954]

After doing some more tests i come to conclusion that from the moment you see the pdf on the screen and then close it immediately it take sometimes 10 seconds before it executes the next statement, when i leave the pdf a few seconds open on the screen and then close it the next statement will be executed almost immediately !

Originally posted by @dany060954 in #4820 (comment)

[GitHubRulesOK]

No as shown in other question SumatraPDF will run the second command in sequence potentially even before the first has completed all its renderings. The problems you encounter are using a shell rather than direct use of the control channel that SumatraPDF itself uses. Internally once loaded RESIDENT it uses piped DDE commands from user keyboard or 3rd party application or others from the shell which may have its own problem handlers.