Problem solved: type ".\tmppear" in the pear.bat file

I solved the problem with some help from an earlier post by "Chris" in respoonse to "Til Dawn." He wrote that setting the PHP_BIN variables isn't enough. You also have to change the command at the end of the file to read: %PHP_BIN% -C -d output_buffering=1 -d include_path=%PEAR_PATH% -f %BIN_DIR% \.tmppear -- %1 %2 %3 %4 %5 %6 %7 %8 %9 @ECHO ON The "-f %BIN_DIR%\.tmppear" part does the trick, as Chris said. I'm running PHP 4.3 on Windows XP.