PLS-00123: Program Too Large when compile invalid objects in PL/ SQL ?

Go to PL/ SQL -> Tools -> Preferences -> Oracle Debugger:

a). Un-check the "Add debug information when compiling".

b). Click the "Apply" button.

c). Click the "OK" button.

d). Compile invalid objects now.

NOTE: In case you want to debug your package in PL/ SQL, you will need to check the "Add debug information when compiling" checkbox.