SQL Console - invalid column name (JDBC-260)

Hi together,

any ideas to the following problem.

I've created a table while importing csv-File into schema.

Data looks quite good with SQL Console as far as I use

select * from table;

When I try to enhance SQL-Statement by a where clause, i always get the error: invalid column name (SAP DBTech JDBC: [260]). I've tried with different columns but always the same error.

select * from table where column1 = 'XYZ'. Sure, column1 is an existing column of the table.

Kind regards,

Hans