No pdf was created as acrobat encountered an un-identified error.

I have multiple PNG image files to be combined as single Pdf. but when tried to combine say the above error. I tried to figure it out. this error and found it might be due to PNG 24 bit depth file type. I want to ask are there any customized setting to combine 24 bit depth PNGs as pdf. whether these files are supported files in Acrobat. Remember 32 bit depth PNGs have no problem to be combined as Pdf. Thanks.

Its not on any Network but on my laptop 64 bit windows.