ERRORLEVEL% will expand into a string representation of the current value of ERRORLEVEL, provided that there is not already ...

%%ERRORLEVEL%% will expand into a string representation of
the current value of ERRORLEVEL, provided that there is not already
an environment variable with the name ERRORLEVEL, in which case you
will get its value instead.  After running a program, the following
illustrates ERRORLEVEL use:

    goto answer%%ERRORLEVEL%%
    :answer0
    echo Program had return code 0
    :answer1
    echo Program had return code 1

You can also use numerical comparisons above:

    IF %%ERRORLEVEL%% LEQ 1 goto okay

%%CMDCMDLINE%% will expand into the original command line passed to
CMD.EXE prior to any processing by CMD.EXE, provided that there is not
already an environment variable with the name CMDCMDLINE, in which case
you will get its value instead.

%%CMDEXTVERSION%% will expand into a string representation of the
current value of CMDEXTVERSION, provided that there is not already
an environment variable with the name CMDEXTVERSION, in which case you
will get its value instead.

ERROR: You must have administrator privileges to run this tool. Please open an administrator command prompt and try again. ... ERROR: You must provide either a password, recovery key or recovery password for repair. Examples: "-pw" "-rk F:\RecoveryKey.bek" ... ErrorDescription is a free-form string supplying more information about the error recorded in LastErrorCode property, and ... ErrorDescription is a free-form string supplying more information about the error recorded in LastErrorCode, and information ... ERRORLEVEL% will expand into a string representation of the current value of ERRORLEVEL, provided that there is not already ... ErrorMethodology for CIM_Memory is a string property that indicates whether parity or CRC algorithms, ECC or other mechanisms ... ErrorMethodology is a free-form string describing the type of error detection and correction supported by this storage extent. ... ErrorMethodology is a free-form string describing the type(s) of error detection and correction supported by this device. ... Errors occured while decrypting the Offline Files cache. Increase the Offline Files event logging level policy to level 2 ...