Are there any system apps or other background apps that may in some\nfashion intermittently access an open doc in Panther, making it seem to\nits parent app to be "In use"?\n\nReason for asking is the following: I'm running an older (but good!)\nMac implementation of TeX called Textures in Classic under Panther.\nTextures has a near-WYSIWYG mode of operation in which the instant you\nhit a keystroke to edit your TeX source file ("myFile.tex") as seen in\nthe edit window, Textures instantly starts re-TeXing the modified source\nfile and redisplaying the typeset output in its display window.\n\nIf you're also using the LaTeX macro package, as I am, this means that\nTextures, in addition to continually re-TeXing the main source file, is\nalso continually writing to and reading from an auxiliary file it\ncreates ("myFile.aux"). The resulting problem is (as noted in an\nearlier post) that as I edit along in the source file I intermittently\nand randomly get a TeX (i.e., Khuthian) error message which says\n\n"I'm having trouble with "myFile.aux" (in use)"\n\nClicking OK to the error message sends it away and allows editing and\ntypesetting to continue with no apparent damage; but it often reappears\ntwo or three times in a row.\n\nIt's been suggested that Spotlight indexing in the background may cause\nthis effect in Tiger, but I'm still in 10.3.9. What other apps might\nhave a similar effect in Panther? Any simple way to monitor what might\nbe the cause?