Runtime Error when open Pokemon Essentials for first time

[HappyzLife]

[GOOGLE TRANSLATED FROM ITALIAN]
Good evening, I downloaded Pokemon Essentials but when I try to open it gives me the following error:

Spoiler:

---------------------------
Pokemon Essentials
---------------------------
Exception: RuntimeError

Message: filename is nil

SpriteWindow:218:in `initialize'

Pokemon_Sprites:113:in `new'

Pokemon_Sprites:113:in `pokemon='

Pokemon_Sprites:99:in `initialize'

PScreen_Load:172:in `new'

PScreen_Load:172:in `pbSetParty'

PScreen_Load:171:in `each'

PScreen_Load:171:in `pbSetParty'

PScreen_Load:324:in `pbStartLoadScreen'

Main:6:in `main'



This exception was logged in

C:\Users\Vincenzo\Saved Games/Pokemon Essentials/errorlog.txt.

Press Ctrl+C to copy this message to the clipboard.
---------------------------
OK
---------------------------

RPG Maker XP I bought on Steam
And Pokemon Essentials of the 31st December, 2014 also with the update files to the 25th January, 2015. (To install it I just replaced the files in rar the last update in the Data folder of the penultimate update)
Please help me :'(


[ORIGINAL]
Buonasera, ho scaricato Pokemon Essentials ma quando provo ad aprirlo mi da il seguente errore:

Spoiler:

---------------------------
Pokemon Essentials
---------------------------
Exception: RuntimeError

Message: filename is nil

SpriteWindow:218:in `initialize'

Pokemon_Sprites:113:in `new'

Pokemon_Sprites:113:in `pokemon='

Pokemon_Sprites:99:in `initialize'

PScreen_Load:172:in `new'

PScreen_Load:172:in `pbSetParty'

PScreen_Load:171:in `each'

PScreen_Load:171:in `pbSetParty'

PScreen_Load:324:in `pbStartLoadScreen'

Main:6:in `main'



This exception was logged in

C:\Users\Vincenzo\Saved Games/Pokemon Essentials/errorlog.txt.

Press Ctrl+C to copy this message to the clipboard.
---------------------------
OK
---------------------------

Ho RPG Maker XP comprato su Steam
E Pokemon Essentials del 31st December, 2014 con anche i file dell'aggiornamento al 25th January, 2015. (Per installarlo ho solamente sostituito i file nel rar dell'ultimo aggiornamento nella cartella Data del penultimo aggiornamento)
Perfavore aiutatemi :'(

 

[HappyzLife]

Ok... i really don't know why but when i retryed to run Pokemon Essentials the error didn't appeared...