How Combine 3 OSC Controls Vector in One?
Patches should be posted using Max' "Copy compressed" feature.
Commas have a special meaning in Max, they separate different messages into a single message box.
Here is a trivial example of sending 3 values with a single message, if this is what your OSC receiver is expecting. If you really need commas, they have to be escaped with a backslash.
Max Patch
Copy patch and select New From Clipboard in Max.