Yes, a program/script is calling a procedure in a DLL file that does not exist.
Basically it is either a software conflict (different version of a DLL file installed than expected) or just a poorly written piece of software - either way, it is doubtful that it is your fault - you can try reinstalling the software.
If you or anyone else is interested, a .DLL file or .EXE file is pretty similar - it just contains a bunch of subroutines and programming instructions.
The main difference between a .DLL and a .EXE is a .EXE is designed to start at a set instruction each time it is run and then call upon further instructions from itself or other files, where as, a DLL file just contains a bunch of instructions and no main entry point.
In this example,
pcdrcui.exe is trying to call the
SymGetUnwindInfo entry point/instruction out of the
dbhhelp.dll file which does not exist.