> Source: [sk180268](https://support.checkpoint.com/results/sk/sk180268)

# sk180268 - Package installation with CDT fails with "Error code 55" 

| Property | Value |
|----------|-------|
| Solution ID | sk180268 |
| Date Created | 2022-11-29 |
| Last Modified | 2024-12-23 |
| Technical Level | Advanced |
| Products | Hardware |
| Versions | Not Version-Specific |
| OS | Gaia |

## Symptoms

- * When trying to upgrade using CDT, the operation results with Error 55:

  ```
  
  "Candidate list error has occurred:
  
  Error code 55 - No candidates are selected for installation.
  Mark at least one valid candidate (gateway or cluster member) for installation and try again."
  ```

* Candidates file shows "N/A" value in the Upgrade Order column:

  ```
  
  Object Name   Cluster Name    IP Address   Version/JHF Take   State      Upgrade Order
  MEMBER1_NAME �CLUSTER_NAME  � IP_ADDRESS  �R80.30/237 � � � � standby    N/A
  MEMBER2_NAME �CLUSTER_NAME �  IP_ADDRESS  �R80.30/237 � � � � active � � N/A
  ```

* Members Upgrade logs in the CDT Logging directory */var/log/CPcdt/* contains the following lines:

  ```
  
  *D*: Executing command: cprid_util -server IP_ADDRESS -verbose rexec -rcmd /bin/rpm -Uhv --force /tmp/DDR-00-00.i386.rpm
  *D*: retry count = 0, out = rpmdb: Lock table is out of available locks
  error: cannot open Packages index using db3 - Cannot allocate memory (12)
  error: cannot open Packages database in /var/lib/rpm
  rpmdb: Lock table is out of available locks
  error: cannot open Packages database in /var/lib/rpm, rc = 1
  *D*: DDR RPM installation failed. Retrying...
  
  Command Summary:
  Command = /bin/rpm -Uhv --force /tmp/DDR-00-00.i386.rpm
  Return code = 1
  Output = rpmdb: Lock table is out of available locks
  error: cannot open Packages index using db3 - Cannot allocate memory (12)
  error: cannot open Packages database in /var/lib/rpm
  rpmdb: Lock table is out of available locks
  error: cannot open Packages database in /var/lib/rpm
  ```

## Solution

This solution requires authentication. Please log in to view the full solution.

---

# Agent Instructions

This content is from the Check Point Support Center (https://support.checkpoint.com), the official knowledge base for Check Point cybersecurity products.

## Navigating This Knowledge Base

- **Complete index**: [llms.txt](https://support.checkpoint.com/llms.txt)
- **All SK articles**: [SecureKnowledge Sitemap](https://support.checkpoint.com/sitemaps/secureknowledge-sitemap-index.xml)
- **SK article URL pattern**: `https://support.checkpoint.com/results/sk/{skId}`
- **Markdown responses**: AI bot User-Agents automatically receive `text/markdown` content