I now had a deeper look into the source code of main/tdelibs/tdeio/tdefile/kpropertiesdialog.cpp and maybe found the root cause. In line 2088 bool allDisable = true; is defined to enable/disable the OK button. This value is only set to false in line 2100 ... // Draw Checkboxes bool allDisable = true; TQCheckBox *cba[3][4]; for (int row = 0; row < 3 ; ++row) { for (int col = 0; col < 4; ++col) { TQCheckBox *cb = new TQCheckBox( gb ); if ( col != 3 ) theNotSpecials.append( cb ); cba[row][col] = cb; cb->setChecked(aPermissions & fperm[row][col]); if ( aPartialPermissions & fperm[row][col] ) { cb->setTristate(); if( d->canChangePermissions ) { +++ allDisable = false; } cb->setNoChange(); ... As far as I understand, the button is only enabled if more than one file is selected and the file permissions of the files differ in some flags. But this dialog the only interface to the flags "Set UID", "Set GUI" and "Sticky". So you can not change this flags for a single file. Maybe enabling the OK button, when you are allowed to change permissions (canChangePermissions) and not only if aPartialPermissions is true, solves the problem. Thanks Stef On Thursday, 11. July 2019, Slávek Banko wrote: --------------------------------------------------------------------- To unsubscribe, e-mail: trinity-users-unsubscribe(a)lists.pearsoncomputing.net For additional commands, e-mail: trinity-users-help(a)lists.pearsoncomputing.net Read list messages on the web archive: http://trinity-users.pearsoncomputing.net/ Please remember not to top-post: http://trinity.pearsoncomputing.net/mailing_lists/#top-posting