# Development-time Errors

### Field Tables and View Buffers

Problem: In the Source View of the control, if there is a red line under the field table classes or view classes, this indicates that WebLogic Workshop cannot load the named classes.

Cause/Resolution: The error is typically caused by either not having compiled the field table or view table or not having updated/added the package name in the generated source file.

### Buffer-type Mismatch

Problem: If buffer-type attribute is set to fml32 and the field-tables attribute specifies an FML table and mapping-strictness is strict, a development-time error similar to the following results:

    simpapp.jcx.20:Conversion of String to Short disallowed, name=StringField
    SUGGESTION: Check argument and field types.

Resolution: Open <field-table>.java file and check whether it is FldTbl or FldTbl32.