Android Question Error in compiling

B4A Version: 7.80
Parsing code.    (0.43s)
Compiling code.    (4.75s)
Compiling layouts code.    (0.43s)
Organizing libraries.    (0.01s)
Generating R file.    (0.36s)
Compiling debugger engine code.    (6.76s)
Compiling generated Java code.    (8.47s)
Convert byte code - optimized dex.    Error
PARSE ERROR:
class name (com/torang/R) does not match path (com/torang/r.class)
...while parsing com/torang/r.class
1 error; aborting