Windows development & engineering support from KomuraSoft

Bug Investigation & Root Cause AnalysisTurn an intermittent failure into an investigation.

Crashes you cannot reproduce locally, occasional communication stalls and failures after days of operation. We use logs and measurements to narrow the causes and guide repairs or further investigation.

No specification document needed. Start with what you know.

  • Work directly with an engineer
  • Start before requirements are finalized
  • Commission only the scope you need

You do not need a finished specification

Start with the problem you need to solve.

The application fails only after days or weeks

We record resource trends and failure paths to narrow down the conditions that lead to the problem.

The application, device and network are all possible causes

We compare logs, packets and Windows behavior to isolate the issue.

You have logs, but they do not explain the failure

We identify the missing observation points and collect evidence that can test the hypotheses.

Discuss the technical details with the engineer doing the work.

Profile photo of Go Komura

Founder & engineer

Go Komura

A Windows-focused engineer works with you from the initial discussion through investigation, design and implementation. You do not need to have every technical detail worked out before getting in touch.

Experience & technologies / Company information

Published technical case study

Investigating a crash after extended operation

We tracked handle counts and added logs at processing boundaries, narrowing the investigation to a handle leak.

Read the problem and investigation approach

Scope of support

A focused task or a complete application.

From a specific investigation or change to end-to-end development, we agree on a scope that fits your situation.

Fault isolation and root cause investigation

Investigate conditions and possible causes of crashes, communication stalls and hard-to-reproduce failures.

Long-running failure analysis

Track memory and handle leaks, resource exhaustion and growing thread counts over time.

Repair and recurrence-prevention support

Use the findings to plan repairs, improve logging and develop failure-path tests.

Examples of results and deliverables

  • Confirmed findings and possible causes
  • A repair approach or next validation steps
  • Recommendations for logging and observation

These are examples, depending on the work commissioned. We agree on the scope and format of deliverables when preparing the estimate.

Facing a similar challenge? Tell us where things stand.

No specification document needed. Start with what you know.

Pricing and process

You do not need every detail decided to get started.

Commission an investigation first

You can start with isolation and root cause investigation without committing to the repair work. We agree on the investigation period and reporting scope in advance.

Pricing guide

Quoted for the investigation scope and period

Standalone bug investigation is a paid service. We do not guarantee root cause identification; we distinguish confirmed findings from what remains unverified.

Initial feasibility checks and paid engagements

Initial checks needed to assess feasibility and prepare an estimate are generally free, on the understanding that you will commission the full development if it is found feasible. Extended validation, dedicated environments, prototypes, proofs of concept and detailed investigation reports may require a paid engagement.

An investigation or review commissioned in its own right is quoted as a separate paid service. We explain the scope and cost before any paid work begins.

  1. Tell us about the situation

    Share your goal, the problem and the environment, as far as you know them.

  2. Review the scope and cost

    We outline the investigation needed, scope, deliverables, cost and proposed process.

  3. Agree before work begins

    During the work, we share progress, confirmed findings and remaining constraints.

  4. Review the results and handover

    We validate the results under agreed conditions and prepare for deployment or the next step.

Need more technical detail?

Explore technologies and the detailed approach

Turn “it sometimes stops” into a problem that can be investigated.

It will not reproduce locally. It crashes only after extended operation. Nobody knows whether the application or the equipment is responsible. Instead of making speculative changes, we increase the available evidence and narrow the possible causes.

Symptoms we can investigate

  • Crashes or stops after hours or weeks of continuous operation.
  • Intermittent communication failures with industrial cameras or other equipment.
  • Memory usage, handles or threads that keep increasing.
  • Instability limited to certain PCs or operating conditions.
  • Logs that exist but do not explain the sequence leading to a failure.

Our investigation process

1. Establish the conditions and impact

We review the symptom, frequency, environment and preceding actions or changes. We organize separate hypotheses for application behavior, communications, equipment and the OS.

2. Collect relevant evidence

We select logs, packets, exceptions, memory usage, handle counts and other evidence according to the hypotheses being tested. Where information is missing, we add observation points and consider the operational overhead of collection.

3. Test the possible causes

We narrow the triggering conditions and test hypotheses through reproduction and comparison. Confirmed facts remain distinct from assumptions, forming the basis for a repair plan or further investigation.

Make the findings useful for the next decision

When a cause is found, we outline the repair and how to validate it. When it cannot be identified within the agreed investigation period, we still document the factors ruled out, remaining possibilities and evidence needed next. The reporting format and scope are agreed at the start.

Where appropriate, we also improve logs that trace individual operations, records of resource allocation and release, and failure-path testing. The aim is not only recovery, but a clearer and faster decision the next time the symptom appears.

What to share in the first inquiry

Tell us the symptom, how often it occurs, which Windows environment and application are involved, and what you have tried. Knowing whether logs and source code are available also helps us plan. There is no need to attach confidential information or credentials to the initial inquiry.

For ongoing fixes or maintenance, the investigation can be combined with Windows software maintenance and modernization.

Questions before commissioning work

Can we commission only the investigation?

Yes. You can commission fault isolation or root cause investigation without the repair work. We agree on the scope, period and reporting before starting. Standalone investigation is a paid service.

Can you help with a fault that rarely reproduces?

Yes. We review logs, communication records and resource usage around the failure, then identify missing observation points. When a reproduction environment is unavailable, we can start by planning how to collect evidence in the operating environment.

Do you guarantee that the root cause will be found?

No. What can be established depends on reproducibility and the evidence available. We distinguish confirmed facts, possible causes and unverified points so that the findings support decisions about further investigation or repairs.

Get in touch

A few lines about your situation are enough.

You do not need a detailed specification or technical terminology. Share what you know about:

  • The problem or the outcome you need
  • The software, devices and operating environment
  • Your preferred timeframe, even if it is not decided

There is no need to send confidential documents or passwords with your initial inquiry.

Example inquiry

Our application stops after extended operation, but we cannot reproduce it in the development environment. We would like advice on what to investigate first.

No specification document needed. Start with what you know.

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