General Description: Two sets double quotation marks are required for string attributes on components that use ACCEL=VCS (i.e., use Verilog as simulation source).
Solution
Two double quotation marks ("""") are required for the hex string attribute values on symbols that use Verilog as simulation model. So, if you need to change a string attribute value such as WRITE_MODE, that value must be enclosed in two sets of double quotation marks, as in the following example:
WRITE_MODE_A=""WRITE_FIRST""
However, for symbols that point to a VHDL model (ACCEL=VANTAGE) (i.e., use SPEEDWAVE for the simulator), only one set of double quotation marks is required.