Douglas,

I'm not sure why it's throwing an exception...if you don't specify otherwise, the data access class uses the SQLCommandBuilder to generate insert, update, and delete statements from the SELECT statement. I'm not sure if this would fix the problem, but in either case, I recommend using parameterized queries rather than concatenating strings (see the MM .NET Dev Guide topic "Retrieving Data using SQL SELECT Command Strings"...there's a warning about SQL injection).

For example:

public void test(string cidSuggest, DateTime date, int iEntryStepNum)
{

	string cmd = "SELECT cidSuggest, iEntryStepNum, tLastUpd FROM suggest WHERE cidSuggest = @cidSuggest";

	DataSet dsSuggest = GetDataSet(cmd, this.CreateParameter("@cidSuggest, cidSuggest));
	dsSuggest.Tables[0].Rows[0]["iEntryStepNum"] = iEntryStepNum;
	dsSuggest.Tables[0].Rows[0]["tLastUpd"] = DateTime.Now;
	mmSaveDataResult result = SaveDataSet();

	...

}

If this doesn't fix the problem, I recommend setting a breakpoint in mmDataAccessSql.CreateUpdateCommand() to see what's happening.

Regards,