tag.generateReadMessageRequest is not a function

[dblasiwic]

When trying to read a tag and it's value, this error message is generated:

tag.generateReadMessageRequest is not a function

The error refers to ethernet-ip/src/controller/index.js In the read and write tag methods at appx lines 480 and 513.

const MR = tag.generateWriteMessageRequest(value, size);

Unable to determine why this is happening.