Fangyi, In the current standard it need to be (param_name "param_value"). I have proposed that if does not contain <space>, <cr> or <lf> that the " are optional - at least in the .ami file. This is what Excel does in csv file when cells contain a comma or space.. But this did not seam to get any traction in the group. Walter Walter Katz 303.449-2308 Mobile 720.333-1107 wkatz@xxxxxxxxxx www.sisoft.com -----Original Message----- From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx]On Behalf Of fangyi_rao@xxxxxxxxxxx Sent: Monday, March 15, 2010 6:13 PM To: ibis-macro@xxxxxxxxxxxxx Subject: [ibis-macro] question about string parameter in AMI Hi, Experts; Shall the double quote of the value of a string parameter be included in the input parameter string of the Init call? For example, if an AMI model has a string parameter with name "param_name" and value "param_value", should the input parameter string be (param_name "param_value") or (param_name param_value) Thanks in advance, Fangyi