# Cannot add process "Publish to MQTT" to input **URL:** \ **Category:** Emoncms\ **Tags:** error, inputprocessing\ **Created:** [7 December 2017 23:35 UTC](https://community.openenergymonitor.org/t/cannot-add-process-publish-to-mqtt-to-input/5905 "2017-12-07T23:35:04Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![pepso](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/p/f19dbf/32.png) [@pepso](https://community.openenergymonitor.org/u/pepso)\ **Post date:** [7 December 2017 23:35 UTC](https://community.openenergymonitor.org/t/cannot-add-process-publish-to-mqtt-to-input/5905/1 "2017-12-07T23:35:04Z")
Hi, On the emoncms version low-write 9.8.24 | 2017.11.27 i cannot add the process “Publish to MQTT” to an input with content “node2/amps”, it displays the following error: **ERROR: Could not save processlist. Invalid characters in arg** The char it is complaining is the “/”. ![29](https://community.openenergymonitor.org/uploads/default/original/2X/0/000e5069c68cacf00f3fbf08ad12c7de84399bc1.png) Cheers, VP ---
**Author:** ![pb66](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/pb66/32/27_2.png) [@pb66](https://community.openenergymonitor.org/u/pb66)\ **Post date:** [8 December 2017 01:10 UTC](https://community.openenergymonitor.org/t/cannot-add-process-publish-to-mqtt-to-input/5905/2 "2017-12-08T01:10:43Z")
I think @TrystanLea is aware of this and will fix soon, see github issue > > > Hi, > > In input process list, I cannot publish to MQTT when I use a '/' charact…er. > > Publish to 'power1' works > Publish to 'emon/power1' brings 'ERROR: Could not save processlist. Invalid characters in arg' when I want to save. > > Kind regards, > > > My configuration > \`\`\` > > Emoncms | Version | 9.8.24 \\| 2017.11.27 > \-- | -- | -- >   | Modules | Administration \\| App v1.0.0 \\| Dashboard v1.1.1 \\| EventProcesses \\| Feed \\| Graph v1.0.0 \\| Input \\| notify \\| CoreProcess \\| Schedule \\| Time \\| User \\| Visualisation > Server | OS | Linux 4.9.0-4-amd64 >   | Host | emoncms (127.0.1.1) >   | Date | 2017-12-05 19:13:57 CET >   | Uptime | 19:13:57 up 21:04, 2 users, load average: 0.00, 0.00, 0.00 > HTTP | Server | Apache/2.4.25 (Debian) HTTP/1.1 CGI/1.1 80 > MySQL | Version | 5.5.5-10.1.26-MariaDB-0+deb9u1 >   | Host | localhost (127.0.0.1) >   | Date | 2017-12-05 19:13:57 (UTC 01:00‌​) >   | Stats | Uptime: 75853 Threads: 1 Questions: 18965 Slow queries: 0 Opens: 22 Flush tables: 1 Open tables: 16 Queries per second avg: 0.250 > Redis | Version | 3.2.6 >   | Host | localhost:6379 (127.0.0.1) >   | Size | 48 keys (800.23K)Flush >   | Uptime | 0 days > MQTT | Version | 1.4.14 >   | Host | localhost:1883 (127.0.0.1) > Memory | RAM | Used 42.23%Total: 474.12 MB Used: 200.21 MB Free: 273.91 MB >   | Swap | Used 0.00%Total: 510 MB Used: 0 B Free: 510 MB > Disk | Mount | Stats >   | / | Used 9.95%Total: 19.07 GB Used: 1.9 GB Free: 16.18 GB > PHP | Version | 7.0.19-1 (Zend Version 3.0.0) >   | Modules | apache2handler \\| calendar v7.0.19-1 \\| Core v7.0.19-1 \\| ctype v7.0.19-1 \\| curl v7.0.19-1 \\| date v7.0.19-1 \\| dio v0.0.9 \\| dom v20031129 \\| exif v1.4 \\| fileinfo v1.0.5 \\| filter v7.0.19-1 \\| ftp v7.0.19-1 \\| gettext v7.0.19-1 \\| hash v1.0 \\| iconv v7.0.19-1 \\| igbinary v2.0.1 \\| json v1.4.0 \\| libxml v7.0.19-1 \\| mcrypt v7.0.19-1 \\| mysqli v7.0.19-1 \\| mysqlnd \\| openssl v7.0.19-1 \\| pcre v7.0.19-1 \\| PDO v7.0.19-1 \\| pdo\_mysql v7.0.19-1 \\| Phar v2.0.2 \\| posix v7.0.19-1 \\| readline v7.0.19-1 \\| redis v3.1.1 \\| Reflection v7.0.19-1 \\| session v7.0.19-1 \\| shmop v7.0.19-1 \\| SimpleXML v7.0.19-1 \\| sockets v7.0.19-1 \\| SPL v7.0.19-1 \\| standard v7.0.19-1 \\| sysvmsg v7.0.19-1 \\| sysvsem v7.0.19-1 \\| sysvshm v7.0.19-1 \\| tokenizer v7.0.19-1 \\| wddx v7.0.19-1 \\| xml v7.0.19-1 \\| xmlreader v7.0.19-1 \\| xmlwriter v7.0.19-1 \\| xsl v7.0.19-1 \\| Zend OPcache v7.0.19-1 \\| zlib v7.0.19-1 \\| > > > \`\`\` ---
**Author:** ![mattwire](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/mattwire/32/390_2.png) [@mattwire](https://community.openenergymonitor.org/u/mattwire)\ **Post date:** [5 June 2018 19:44 UTC](https://community.openenergymonitor.org/t/cannot-add-process-publish-to-mqtt-to-input/5905/3 "2018-06-05T19:44:53Z")
@TrystanLea @pb66 The same change needs to be made to the feed process ([MQTT and email processes should be unavailable to feed processing · Issue #854 · emoncms/emoncms · GitHub](https://github.com/emoncms/emoncms/issues/854)) ---
**Author:** ![pb66](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/pb66/32/27_2.png) [@pb66](https://community.openenergymonitor.org/u/pb66)\ **Post date:** [5 June 2018 20:07 UTC](https://community.openenergymonitor.org/t/cannot-add-process-publish-to-mqtt-to-input/5905/4 "2018-06-05T20:07:55Z")
Hi Matt, I have just replied to the github issue you raised. I’m wondering if you are likely to get the results you expect if you call the publish to mqtt process from a virtual feed.