Dear Keita, Thank you for the revision.
As suggested, I replace (sesame-TeX-target-region-p) by TeX-current-process-region-p. I do not have to call (TeX-active-master-with-quotes nil t) from TeX-command-expand anymore. Now things work well. As Tassilo inferred TeX-active-master-with-quotes is described as: > Helper function of ‘TeX-command-expand’. Use only within entries in > ‘TeX-expand-list-builtin’ and ‘TeX-expand-list’. I think that I called (TeX-active-master-with-quotes) in inappropriate way. Thank you very much both! BTW I found typo in docstring for TeX-current-process-region-p. tex-buf.el (defvar TeX-current-process-region-p nil - "This variable is set to t iff the last TeX command is on a region.”) + "This variable is set to t if the last TeX command is on a region.") Tak
