"There were no proceedings today as judge (Malik Muhammad Akram) Awan had to go for an engagement in the Supreme Court," Shahbaz Rajput, the lawyer for some of the accused said in a news agency report.
Sources said that the hearing of the case on the scheduled on Feb 20 was unlikely to happen as the Bar Council elections are scheduled for the same day.
The trial of accused Lakhvi, Zarar Shah, Abu al-Qama, Hamad Amin Sadiq, Shahid Jamil Riaz, Jamil Ahmed and Younas Anjum, conducted within Adiala Jail in Rawalpindi for security reasons, is expected to resume only on Feb 27.
The accused were formally tried in 2009 for planning and helping execute the assault on India's financial hub in November 2008.
Citing existence of 161 witnessed special public prosecutor Malik Rab Nawaz Noon in a recent statement said that Pakistani authorities had "incriminating" evidence to prove Lakhvi and the six other accused involvement in the Mumbai terror attacks.
Noon was hired by the interior ministry to head the prosecution team in the Rawalpindi-based anti-terrorism court where the trial of the seven suspects is being conducted.