Yeah XBony but you did not release my version yet... So that fault goes to your side...
My proof: I checked the line in the code that causes the crash:
Crash line:
sry for the post with log before )
Yeap, it was a chamber, but I had already sent message to the moderation and can't edit post.
Reactor was finished and card was used on them. Than I attached a chamber to the outer part(pressure vessel) of reactor and then server had crashed.
[Crash report]
Description: Ticking block entity
java.lang.ClassCastException: ic2.core.block.reactor.tileentity.TileEntityNuclearReactorElectric cannot be cast to ic2.core.block.reactor.tileentity.TileEntityReactorChamberElectric at shedar.mods.ic2.nuclearcontrol.items.ItemCard55Reactor.update(ItemCard55Reactor.java:47) at shedar.mods.ic2.nuclearcontrol.tileentities.TileEntityInfoPanel.processCard(TileEntityInfoPanel.java:710) at shedar.mods.ic2.nuclearcontrol.tileentities.TileEntityInfoPanel.func_70296_d(TileEntityInfoPanel.java:735) at shedar.mods.ic2.nuclearcontrol.tileentities.TileEntityInfoPanel.func_145845_h(TileEntityInfoPanel.java:402) at net.minecraft.world.World.func_72939_s(World.java:1939) at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:489) at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:636) at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:334) at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)
A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
-- Head --Stacktrace: at shedar.mods.ic2.nuclearcontrol.items.ItemCard55Reactor.update(ItemCard55Reactor.java:47) at shedar.mods.ic2.nuclearcontrol.tileentities.TileEntityInfoPanel.processCard(TileEntityInfoPanel.java:710) at shedar.mods.ic2.nuclearcontrol.tileentities.TileEntityInfoPanel.func_70296_d(TileEntityInfoPanel.java:735) at shedar.mods.ic2.nuclearcontrol.tileentities.TileEntityInfoPanel.func_145845_h(TileEntityInfoPanel.java:402)
-- Block entity being ticked --Details: Name: IC2NCAdvancedInfoPanel // shedar.mods.ic2.nuclearcontrol.tileentities.TileEntityAdvancedInfoPanel Block type: ID #416 (tile.null // shedar.mods.ic2.nuclearcontrol.blocks.BlockNuclearControlMain) Block data value: 9 / 0x9 / 0b1001 Block location: World: (-1,76,8), Chunk: (at 15,4,8 in -1,0; contains blocks -16,0,0 to -1,255,15), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511) Actual block type: ID #416 (tile.null // shedar.mods.ic2.nuclearcontrol.blocks.BlockNuclearControlMain) Actual block data value: 9 / 0x9 / 0b1001Stacktrace: at net.minecraft.world.World.func_72939_s(World.java:1939) at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:489)
-- Affected level --Details: Level name: world All players: 0 total; [] Chunk stats: ServerChunkCache: 625 Drop: 0 Level seed: 8077961695302078571 Level generator: ID 02 - largeBiomes, ver 0. Features enabled: true Level generator options: Level spawn location: World: (0,64,0), Chunk: (at 0,4,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511) Level time: 38256650 game time, 22285251 day time Level dimension: 0 Level storage version: 0x04ABD - Anvil Level weather: Rain time: 38902 (now: false), thunder time: 34540 (now: false) Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: trueStacktrace: at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:636) at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:334) at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)-- System Details --Details: Minecraft Version: 1.7.10 Operating System: Linux (amd64) version 2.6.32-042stab108.5 Java Version: 1.8.0_51, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 11667776 bytes (11 MB) / 259522560 bytes (247 MB) up to 259522560 bytes (247 MB) JVM Flags: 0 total; AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used IntCache: cache: 0, tcache: 0, allocated: 15, tallocated: 103 FML: MCP v9.05 FML v7.10.99.99 Minecraft Forge 10.13.4.1490 15 mods loaded, 15 mods active States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored UCHIJAAAA mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) UCHIJAAAA FML{7.10.99.99} [Forge Mod Loader] (forge-1.7.10-10.13.4.1490-1.7.10-universal.jar) UCHIJAAAA Forge{10.13.4.1490} [Minecraft Forge] (forge-1.7.10-10.13.4.1490-1.7.10-universal.jar) UCHIJAAAA BuildCraft|Core{7.0.20} [BuildCraft] (buildcraft-7.0.20.jar) UCHIJAAAA BuildCraft|Silicon{7.0.20} [BC Silicon] (buildcraft-7.0.20.jar) UCHIJAAAA BuildCraft|Transport{7.0.20} [BC Transport] (buildcraft-7.0.20.jar) UCHIJAAAA BuildCraft|Builders{7.0.20} [BC Builders] (buildcraft-7.0.20.jar) UCHIJAAAA BuildCraft|Robotics{7.0.20} [BC Robotics] (buildcraft-7.0.20.jar) UCHIJAAAA BuildCraft|Energy{7.0.20} [BC Energy] (buildcraft-7.0.20.jar) UCHIJAAAA BuildCraft|Factory{7.0.20} [BC Factory] (buildcraft-7.0.20.jar) UCHIJAAAA ComputerCraft{1.73} [ComputerCraft] (ComputerCraft1.73.jar) UCHIJAAAA craftguide{1.6.8.2} [CraftGuide] (CraftGuide_1.6.8.2_forge.jar) UCHIJAAAA IC2{2.2.760-experimental} [IndustrialCraft 2] (industrialcraft-2-2.2.760-experimental.jar) UCHIJAAAA IC2NuclearControl{2.2.5a-GoingForTheKill} [Nuclear Control 2] (IC2NuclearControl-2.2.5a-GoingForTheKill.jar) UCHIJAAAA Waila{1.5.10} [Waila] (Waila-1.5.10_1.7.10.jar) Profiler Position: N/A (disabled) Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used Player Count: 0 / 20; [] Is Modded: Definitely; Server brand changed to 'fml,forge' Type: Dedicated Server (map_server.txt)sry for my english.
To reproduce:
1. place 5x5 reactor with red port and access hatch.
2. use on it remote 5x5 kit
3. add it to the monitor(advanced? i don't think so)
4. attach reactor block to the reactor access hatch
Ps. i can't find a way to delete reactor block 
His placing was a mistake.