I am getting an error of "Instance ID format is not valid." for a WSG call using the PW_WSG_Dynamic/{class}/InstanceID. I tried the doc guid which is not correct. Does anyone know what format the Instance ID needs to be and what it is made up of for the PW_WSG_Dynamic schema.
Found the answer (https://communities.bentley.com/products/programming/projectwise_programming/f/projectwise-programming---forum/147654/web-service-gateway---read-custom-properties/449810#449810)