Can't read dictionary file

[siddhsql]

this code which translates to:

"C:\Program Files\CMake\bin\cmake.exe" -E copy espeak-ng/dictsource/an_rules espeak-ng/dictsource/an_list
    espeak-ng/build/dictsource/ && 
    "C:\Program Files\CMake\bin\cmake.exe" -E env ESPEAK_DATA_PATH=espeak-ng/build espeak-ng/build/src/espeak-ng.exe --compile=be"

gives me an output like this:

[46/166] Generating espeak-ng-data/be_dict
Can't read dictionary file: 'espeak-ng/build/espeak-ng-data\be_dict'
Using phonemetable: 'be'
Compiling: 'be_list'
        77 entries
Compiling: 'be_rules'
        83 rules, 33 groups (32)

is this expected? if not, how do I fix it? thanks.