Phase unwrapping error

Please I need a help . I want to extract DEM from SLC image . After I start phase unwrapping , I get this error and the process is incomplete. I don’t know the reason . Can any one help me please

Errors of the form:

[main] [...] fork: child -1 - forked process NNNN died unexpectedly, retry 0, exit code 0xC0000142, errno 11

indicate a problem with your cygwin configuration. The mail archive of the cygwin mailing list for the Cygwin project. has some suggestions you can try.

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Please prof. gnwiii
The error is 0 [main] man (11952) C:\cygwin\bin\man.exe: *** fatal error - cygheap base mismatch detected - 0x180317408/0x180343408. This problem is probably due to using incompatible versions of the cygwin DLL. Search for cygwin1.dll using the Windows Start->Find/Search facility and delete all but the most recent version. The most recent versionshould reside in x:\cygwin\bin, where ‘x’ is the drive on which you have installed the cygwin distribution. Rebooting is also suggested