Пробовал на двух компах, PHP 5.6.11 и 7 beta 1 - результат одинаковый:
C:\Users\Audi>pyrus install pear/PhpDocumentor
Pyrus version 2.0.0a4 SHA-1: 72271D92C3AA1FA96DF9606CD538868544609A52
Using PEAR installation found at E:\Program Files\PHP 5.6\pear\packages\
Downloading pear.php.net/PhpDocumentor
Mime-type: application/octet-stream
Pyrus\Registry\Exception: Error: package pear.php.net/PhpDocumentor could not be installed in registry: The SQLite3 object has not been correctly initialised
Exception: The SQLite3 object has not been correctly initialised
То же самое и с другими расширениями:
C:\Users\Audi>pyrus install PEAR2_Console_Color
Pyrus version 2.0.0a4 SHA-1: 72271D92C3AA1FA96DF9606CD538868544609A52
Using PEAR installation found at E:\Program Files\PHP 5.6\pear\packages\
Downloading pear2.php.net/PEAR2_Console_Color
Mime-type: text/plain; charset=UTF-8
Mime-type: application/x-gzip=======================================================================>] 99% (137/138 kb)
Pyrus\Registry\Exception: Error: package pear2.php.net/PEAR2_Console_Color could not be installed in registry: The SQLite3 object has not been correctly initialised
Exception: The SQLite3 object has not been correctly initialised
В чём может быть дело? Куда смотреть?