WGCNA error codes in Network Construction & moduel detection
Looks like a bug in the code which I will try to hunt down and fix. In the meantime, I would suggest playing with maxBlockSize argument to blockwiseModules. Try increasing it as much as your available RAM allows (see the paragraph "A second word of caution concerning block size" on page 6 of WGCNA tutorial I, section 2c, for some guidance on how to set maxBlockSize). Hope this helps.