Sending documentsof opposite party to forensic examination.

When both suits involve identical parties and overlapping property claims, courts routinely order cross-suits to be tagged together. The second case is held at its current operational stage while waiting for the first case to reach parity, or it is being tracked alongside the main suit.

If evidence was never led in Case 2, the Case 2 is stuck at an early stage, likely framing of issues or plaintiff’s evidence.  If both suits were clubbed/consolidated, then the court may have intended for evidence recorded in Case 1 to read as common evidence for Case 2. If no formal consolidation order was passed, Case 2 technically remains open at the pre-evidence or evidence stage.

You can file an aplication in case 2 because Case 2 has not reached final arguments.

However the tenant will argue that your request was already considered and dismissed on merits/delay in Case. since Case 2 is at an earlier stage, you avoid the specific ground of rejection used in Case 1 ("dismissed due to late stage").

Instead of opening a new front in Case 2, challenge the interlocutory order dismissing your forensic application in Case 1 before the High Court (via a Civil Revision Petition or Article 227 Writ Petition). High Courts often allow expert examination even at later stages if the document goes to the root of the title/ownership dispute.