Immigration Canada issues TRP only in special circumstances for the following reasons:

A temporary resident permit is a document that can carry privileges greater than those accorded to visitors, students, and workers with temporary resident status. For example, it allows application inland for a work or study permit, and may give access to health or other social services.
There is no discretion involved in granting permanent residence to persons who meet the requirements of the permit holder class. Persons who remain continuously in Canada on a permit for the specified time and do not become inadmissible on other grounds will be granted permanent residence.

Any person who is:

inadmissible and seeking to enter Canada if an officer is of the opinion that it is justified in the circumstances as per section A24(1);
in Canada and is inadmissible, subject to a report or reportable for violation of the Act, or does not otherwise meet the requirements of the Act;
not eligible for renewal of status.

A permit may be cancelled at any time. The permit is deemed cancelled when the permit holder leaves Canada, unless the document authorizes re-entry.

Permit holders may become permanent residents of Canada as members of the permit holder class if they have not become inadmissible on any grounds other than those for which the original TRP was issued and have resided in Canada for a period of:

There is no provision to allow members of the permit holder class to include family members on their applications for permanent residence. At the time of their original entry into Canada, members of the permit holder class are inadmissible under paragraph A42(b) on grounds of being an accompanying family member of a foreign national who is inadmissible under A38(1) or A42(a). Consequently, they would require their own permit. In order to be considered for permanent residence, such individuals would need to submit their own applications under the permit holder class as principal applicants. Family members living abroad who are eligible for membership in the Family Class may be sponsored once a member of the permit holder class has attained permanent resident status. If accepted in the permit holder class, an applicant is not required to pay the right of permanent residence fee, provided they are a dependent child of another member of the permit holder class who has already submitted an application for permanent residence.

Permit holders are not eligible for permanent residence if they do not meet the requirement of continuous residence in Canada, i.e., there has been a break in continuity. A break in continuity occurs when permit holders, without authorization for re-entry, leave Canada, or when they neglect their responsibility to seek an extension of their status prior to the expiry of their permit.