/**
* Load Document Details
*
* @return error message or null
*/
protected String loadDocumentDetails() {
setC_Currency_ID(NO_CURRENCY);
m_issue = (MProjectIssue) getPO();
setDateDoc(m_issue.getMovementDate());
setDateAcct(m_issue.getMovementDate());
// Pseudo Line
m_line = new DocLine(m_issue, this);
m_line.setQty(m_issue.getMovementQty(), true); // sets Trx and Storage Qty
// Pseudo Line Check
if (m_line.getM_Product_ID() == 0) log.warning(m_line.toString() + " - No Product");
log.fine(m_line.toString());
return null;
} // loadDocumentDetails
