ID:271004 Can't process assignment. Attribute format is illegal -- parsing error <text> (line <number>). Use legal format for ALTERA_ATTRIBUTE assignment.

CAUSE: You specified the ALTERA_ATTRIBUTE assignment, but the specified attribute format is illegal. The Quartus Prime software found the specified parsing error at the specified location. All attributes specified in the assignment ALTERA_ATTRIBUTE must use legal Quartus Prime assignment format. The Quartus Prime software cannot process the assignment unless the attributes, attribute values, and attribute format are legal.

ACTION: Change the format of the ALTERA_ATTRIBUTE assignment so that the attributes are in the format "{-from <source> -to <destination> -section_id <section>} assignment=value;...;{....}assignment=value". The options '-from', '-to', and '-section_id' are optional.