Karabiner-elements: Return complex modifier not working with Alfred

[pdoak]

I am running 10.12.6 with Karabiner-Elements 0.91.9 and Alfred 3.4.1.
I have the following complex modification set:

                                 "description": "Change return to control when used as modifier, return when used alone",
                                "from": {
                                    "key_code": "return_or_enter",
                                    "modifiers": {
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "parameters": {
                                    "basic": {
                                        "to_if_alone_timeout_milliseconds": 400
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "right_control"
                                    }
                                ],
                                "to_if_alone": [
                                    {
                                        "key_code": "return_or_enter",
                                        "modifiers": {
                                            "optional": [
                                                "any"
                                            ]
                                        }
                                    }
                                ],
                                "type": "basic"

The modification seems to be working properly apart from within Alfred. When I invoke Alfred and start searching to find a file/app, if I hit return quickly, Alfred interprets the return key for right control and then return instead of just return.

I think that I need to be able to specify that if the return key is released without another key being pressed then interpret that as just the return key. Is there a way of doing that?

[arumoy-shome]

Same issue here, is there a work around for this?

[tekezo]

Please use lazy: true with "key_code": "right_control"
https://pqrs.org/osx/karabiner/json.html#typical-complex_modifications-examples-post-escape-if-left-control-is-pressed-alone

[pdoak]

Thanks @tekezo. I have amended my complex modification to:

{
                "description": "Change return to control when used as modifier, return when used alone",
                "from": {
                  "key_code": "return_or_enter",
                  "modifiers": {
                    "optional": [
                      "any"
                    ]
                  }
                },
                "parameters": {
                  "basic": {
                    "to_if_alone_timeout_milliseconds": 400
                  }
                },
                "to": [
                  {
                    "key_code": "right_control",
                    "lazy": true
                  }
                ],
                "to_if_alone": [
                  {
                    "key_code": "return_or_enter",
                    "modifiers": {
                      "optional": [
                        "any"
                      ]
                    }
                  }
                ],
                "type": "basic"
              }

When Karabiner loads the json file, I get the following error:

[2018-01-28 18:30:15.084] [error] [grabber] complex_modifications json error: modifier should be string form: ["any"]

Do you know what I need to change to get this working?

Many Thanks

Paul

[pdoak]

I now have this working. I needed to change the above code for the "to_if_alone" to:

 "to_if_alone": [
                  {
                    "key_code": "return_or_enter"
                  }
                ],

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