The disciplinary Committee couldn't contact the witness.

If you can't contact the witness of the Commission for Discipline Inspection, you can try the following methods:

1. Redial the other party's number: the failure of the discipline inspection to summon witnesses may be the result of the interruption of the communication network. You can try to redial the other party's number or change the communication method, such as email or SMS.

2. Ask for help: If the witnesses that the Commission for Discipline Inspection needs to contact cannot be contacted, you can try to contact local communities, organizations and units. Request assistance in contacting the witness.

3. Legal procedures: If the witness cannot be contacted, the Commission for Discipline Inspection can take corresponding measures according to legal procedures. For example, you can apply for a court summons to force witnesses to testify in court.

It should be noted that if the witness may be subject to criminal investigation or property damage because of his testimony, it may affect the cooperation of the witness. Therefore, in the process of obtaining evidence, we should respect the rights of witnesses and collect evidence according to laws and regulations.