TypeError: Cannot read property 'msg' of undefined

[chengchenglee]

I happen to an error like this.

rosrun nrc_svcs http_ros.js
/home/abcde/projects/nrc_ws/src/nrc_svcs/src/infra_http/scripts/http_ros.js:11
const TOS = rosnodejs.require('nrc_msgs').msg;
^

TypeError: Cannot read property 'msg' of undefined
at Object. (/home/abcde/projects/nrc_ws/src/nrc_svcs/src/infra_http/scripts/http_ros.js:11:42)
at Module._compile (internal/modules/cjs/loader.js:1085:14)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
at Module.load (internal/modules/cjs/loader.js:950:32)
at Function.Module._load (internal/modules/cjs/loader.js:790:12)
at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:75:12)
at internal/main/run_main_module.js:17:47

/dev/share/gennodejs/ros/nrc_msgs/srv/_index.js

"use strict";

module.exports = {
  msg: require('./msg/_index.js'),
  srv: require('./srv/_index.js')
};

and in my srv folder is as below.

if I delete the line

  srv: require('./srv/_index.js')

everything is fine.

Could someone help me?

Thanks

[Christian Fritz]

do you have any .srv files? If yes, can you post them?

[chengchenglee]

@chfritz Thank you as always!

I check my .srv files one by one, and I find out that there is a dependency between .srv file and other .msg files.

unfortunately, I manually delete those .msg files, so that when program runs the line.
in GetMapAt.js file

let MapLaneSet = require('../msg/MapLaneSet.js');

the program could not find out ../msg/MapLaneSet.js<=this file.
that is where the error comes from.

A good lesson for me. :)