How do you lock provinces?

[EatYerGreens]

You know the thing where you click a province to highlight it, then hover the cursor over neighbour provinces to see the terrain type for battling across the border?

Will this data have to be amended too?

Will it trigger a crash if the user attempts this but the borders have been closed off in this way, or is it totally okay?

[Kekvit Irae]

REM out (Put // in front of the lines) the following lines for the province you want to lock. I'm using Rome as an example.

//SetNeighbours:: ID_ROME	ID_NAPLES	ID_PAPAL_STATES	ID_TUSCANY	ID_TYRRHENIAN_SEA	
		
//SetBorderInfo::	ID_ROME	ID_TUSCANY	13864	15672	0	ARID	AT_SOUTHERN_EUROPEAN	INLAND	HILLY	NO_RIVER
//SetBorderInfo::	ID_ROME	ID_PAPAL_STATES	14432	15912	0	ARID	AT_SOUTHERN_EUROPEAN	INLAND	HILLY	NO_RIVER
//SetBorderInfo::	ID_NAPLES	ID_ROME	14824	16472	0	ARID	AT_SOUTHERN_EUROPEAN	INLAND	HILLY	NO_RIVER
//SetBorderInfo::	ID_PAPAL_STATES	ID_ROME	14248	15984	0	ARID	AT_SOUTHERN_EUROPEAN	INLAND	HILLY	NO_RIVER
//SetBorderInfo::	ID_TUSCANY	ID_ROME	13904	15808	0	ARID	AT_SOUTHERN_EUROPEAN	INLAND	HILLY	NO_RIVER
//SetBorderInfo::	ID_TYRRHENIAN_SEA	ID_ROME	14128	16400	0	ARID	AT_SOUTHERN_EUROPEAN	COAST	HILLY	NO_RIVER
//SetBorderInfo::	ID_ROME	ID_NAPLES	15064	16456	0	ARID	AT_SOUTHERN_EUROPEAN	INLAND	HILLY	NO_RIVER

//SetAttributes::	ID_ROME				"Rome"			    0		CATHOLIC_CULTURE	ARID	AT_SOUTHERN_EUROPEAN	-1			400		"Rome Castle_xzy"			INLAND	HILLY	NO_RIVER	TRUE

Modify the following lines to remove ID_ROME

SetNeighbours:: ID_TUSCANY	ID_GENOA	ID_ROME	ID_PAPAL_STATES	ID_VENICE	ID_MILAN	ID_LIGURIAN_SEA	ID_TYRRHENIAN_SEA
SetNeighbours:: ID_PAPAL_STATES	ID_TUSCANY	ID_ROME	ID_NAPLES	ID_VENICE	ID_ADRIATIC_OCEAN			//SetNeighbours:: ID_ROME	ID_NAPLES	ID_PAPAL_STATES	ID_TUSCANY	ID_TYRRHENIAN_SEA
SetNeighbours:: ID_NAPLES	ID_ROME	ID_SICILY	ID_PAPAL_STATES	ID_ADRIATIC_OCEAN ID_TYRRHENIAN_SEA ID_STRAITS_SICILY	ID_IONIAN_SEA
SetNeighbours:: ID_TYRRHENIAN_SEA	ID_TUSCANY	ID_ROME	ID_NAPLES	ID_SARDINIA	ID_CORSICA	ID_STRAITS_SICILY	ID_WESTERN_MED	ID_LIGURIAN_SEA

Rome should now no longer be selectable, much less eligable to invade.

I also removed all units from the region. It works fine with the faction leader having Rome as a starting position. If you remove Papal States from FN_PAPIST, then you will effectively isolate the Pope in Rome. Just remember that this will be a challenge for Muslim and Orthodox factions, as they will have no way to "negotiate" a truce to a Crusade except by invading the province with the Chapter House.

[Knight Templar]

You know the thing where you click a province to highlight it, then hover the cursor over neighbour provinces to see the terrain type for battling across the border?

Will this data have to be amended too?

Will it trigger a crash if the user attempts this but the borders have been closed off in this way, or is it totally okay?

I'm not sure, but I think there should be no problems.

[Kekvit Irae]

If you follow my instructions above, there is no possible way to highlight the province, therefor there is no need to worry about hovering your mouse over for invasion info, because it's not there.