I made new modpack for my community but unfortunatly there are no railcraft ores generated... that's really weird.
Does anyone have an idea why?

Railcraft ores spawn in large veins and can be difficult to find.
You should keep looking. Wednesday, 29 July 2015, 10:19pm +02:00 from Thomas Wolfgruber < [email protected]> :

I made new modpack for my community but unfortunatly there are no railcraft ores generated... that's really weird.
Does anyone have an idea why?
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Did you find any? Or is this still an open issue?

No I didn't found any as I tweaked the oregen with ThermalFoundation Worldgen options. I copied this file from the Feed The Beast Infinity PAck but the *.json file was not right formatted so there was no orespawn :D
But it's fixed now.

Cool, thanks!