Upgrade from 1.4.15 LTS to 1.5.12 LTS get Php fatal error Uncaught IntlException

[massimo2022]

Hi all,

PHP 7.4.32

after upgrading from 1.4.15 LTS to 1.5.12 LTS i get this on some emails (not all), the error show opening emails  with "simple" content eg. the ones with text and one or 2 lines as body eg. the test email from the Roundcube installer.

Details:

[13-Jan-2026 21:02:08 Europe/Rome] PHP Fatal error:  Uncaught IntlException: fopen(rcmail_string_replacer.php): failed to open stream: Bad file number in D:\apache\htdocs\webmail\program\lib\Roundcube\bootstrap.php:443
Stack trace:
#0 D:\apache\htdocs\webmail\program\lib\Roundcube\bootstrap.php(443): fopen('rcmail_string_r...', 'r', true)
#1 [internal function]: rcube_autoload('rcmail_string_r...')
#2 D:\apache\htdocs\webmail\program\lib\Roundcube\rcube_text2html.php(145): spl_autoload_call('rcmail_string_r...')
#3 D:\apache\htdocs\webmail\program\lib\Roundcube\rcube_text2html.php(130): rcube_text2html->_converter(NULL)
#4 D:\apache\htdocs\webmail\program\lib\Roundcube\rcube_text2html.php(110): rcube_text2html->_convert()
#5 D:\apache\htdocs\webmail\program\actions\mail\index.php(1102): rcube_text2html->get_html()
#6 D:\apache\htdocs\webmail\program\actions\mail\show.php(742): rcmail_action_mail_index::plain_body(NULL)
#7 D:\apache\htdocs\webmail\program\include\rcmail_output_html.php(1484): rcmail_action_ in D:\apache\htdocs\webmail\program\lib\Roundcube\bootstrap.php on line 443


I also had the issue oops, internal error and i had to copy jquery.ui.datepicker-it.js to jquery.ui.datepicker-it.min.js under \plugins\jq... to fix this.

Of course i've not found any info/fix about the "bad file number" issue.

Eg. The content of one of the emails that show the issue:

"

MIME-Version: 1.0
From: [email protected]
To: [email protected]
Subject: Test message from Roundcube
Message-ID: <0066020880.00006X6I@srv2>
Date: Tue, 13 Jan 2026 18:20:20 -0000
X-Date-Added: Date header was added by srv2


This is a test to confirm that Roundcube can send email.

"


thanks for any help

massimo

[JohnDoh]

assuming the upgrade went smoothly and the file is present in program\lib\Roundcube\ have you checked the permissions?

[alec]

Sounds like PHP issue. How about restarting Apache. https://github.com/roundcube/roundcubemail/issues/8544