In the current official patch, several issues with the 1850 GC.scn file, which is found in the Pride of Nations\VGN\Scens folder, haven't yet been dealt with.
Here are some solutions.
Replace the contents of
lines 492837-492839 with:
25|1|3|1|
50
25|1|3|1|
(This adds the missing coal ressource [3] in the quantity 1 to Bremen, which has got a working coal mine.)
lines 524938-524940:
20|1|21|1|37|1|32|1|
50
20|1|21|1|37|1|32|1|
(This adds the missing wool ressource [32] in the quantity 1 to Dimashq/Syria, which has got a working wool farm.)
line 88808:
4825
(This corrects the unit type for this French fleet, so that it corresponds with the elements it contains.)
line 563419:
Steubenville
(This corrects the name of the city in this region.)
I couldn't find an explanation or solution for the issue that in the Constantinople region all three resources: Tobacco, Cereals, Fish, are indicated as being present in the quantity zero (see as an example below the tooltip for Tobacco):
[ATTACH]39971[/ATTACH]
PS. For renaming the twin Dayton to Steubenville, you must find this string:
{GlobalRegionData}
1619
0
0
-1
0
0
3
0
0
0
0
0
0
0
0
0
10
75
Dayton
For correcting the French merchants unit type, search for:
{Unit}
1012500
4827
and replace 4827 with 4825.
The same applies to:
{Unit}
1012485
4827
and
{Unit}
1012523
4827
and
{Unit}
1012515
4827