Messages

Yes, the Step's help says that "String: Make numeric" can only be used on single lines of clipboard text. The examples you posted were a single line (eg. "06/12/65/11/22").
Maybe you have copied a line break before and/or after the text? If so, you can remove them like this (Step 2):

Code Select Expand

(Start)
TIP: Copy from Start to End to paste into an action.
0001 String: Assign from clipboard text ""
0002 String: Remove line breaks "0"
0003 String: Make numeric ""
0004 Clipboard: Assign text "string$"
(End)
The "0" for Step 2's value means to NOT insert a space where the line breaks are. Specifying "1" will put a space.

Huge thanks Paul, it's all working perfectly now, you're a lifesaver 

Hi Sunny. This action will do it:

Code Select Expand

(Start)
TIP: Copy from Start to End to paste into an action.
0001 String: Assign from clipboard text ""
0002 String: Make numeric ""
0003 Clipboard: Assign text "string$"
(End)

Set the action's hotkey to Ctrl+Win+P, and it will convert the clipboard text to digits only, ready for pasting with Ctrl+V.

Hello Paul,
I pasted the script and ran a test, but an error message appeared 

Hello,

Problem: I copy numbers like 06.12.65.11.22, 06 12 65 11 22 or 06/12/65/11/22
Goal: 0612651122 (digits only)

Wanted functionality:

Keyboard shortcut (Ctrl+Win+P)

Read clipboard

Remove spaces, dots, slashes

Put result back in clipboard

Ready to paste Ctrl+V

Can someone help me code this? Thanks!