Troubleshooting Guide

Common issues and solutions for the Laplace Transform Calculator

🚀 Quick Solutions

Try these first before diving into detailed troubleshooting:

  • • Refresh the page (Ctrl+F5 or Cmd+Shift+R)
  • • Clear your browser cache and cookies
  • • Check your internet connection
  • • Try a different browser (Chrome, Firefox, Safari, Edge)

Input Problems

❌ "Syntax Error" or "Invalid Function"

Symptoms: Red error message appears when typing or submitting a function

Solutions:

  • • Use proper math syntax: sin(3*t) not sin3t
  • • Include multiplication symbols: 2*t not 2t
  • • Use parentheses for clarity: exp(-2*t)
  • • Check for balanced parentheses
  • • Use u(t) for unit step function

❌ Function Not Recognized

Symptoms: Calculator doesn't understand your function notation

Supported Functions:

  • • Basic: t, t^2, t^n
  • • Exponential: exp(a*t), e^(a*t)
  • • Trigonometric: sin(w*t), cos(w*t), tan(w*t)
  • • Step functions: u(t), u(t-a)
  • • Delta function: dirac(t)

❌ Complex Functions Not Working

Symptoms: Piecewise or complex functions showing errors

Solutions:

  • • Break complex functions into simpler parts
  • • Use step functions: f(t)*u(t-a) for delayed functions
  • • Try Premium features for advanced function support
  • • Check the Examples page for similar function patterns

Calculation Issues

❌ "Calculation Failed" or "Server Error"

Symptoms: Function appears valid but calculator can't compute result

Solutions:

  • • Wait 30 seconds and try again (server might be busy)
  • • Simplify your function (remove unnecessary complexity)
  • • Check if you've hit rate limits (100 calculations/hour for free users)
  • • Try a different function first to test if calculator is working

❌ Wrong or Unexpected Results

Symptoms: Calculator gives result but it doesn't match expected answer

Check These:

  • • Verify your input syntax is correct
  • • Check if you need unit step function: f(t)*u(t)
  • • Compare with transform tables (see Common Transform Table)
  • • Consider the region of convergence
  • • Try Premium step-by-step to see the calculation process

❌ Slow Calculations

Symptoms: Calculator takes a long time to compute results

Solutions:

  • • Complex functions naturally take longer
  • • Check your internet connection speed
  • • Close other browser tabs to free up memory
  • • Try simpler functions first

Display & Interface Issues

❌ Math Equations Look Broken

Symptoms: Equations show as plain text or with strange formatting

Solutions:

  • • Wait a few seconds for math rendering to load
  • • Refresh the page
  • • Check if JavaScript is enabled in your browser
  • • Try a different browser
  • • Disable browser extensions temporarily

❌ Plots Not Showing

Symptoms: Empty space where graphs should appear

Solutions:

  • • Enable JavaScript in your browser
  • • Check if your browser supports WebGL
  • • Disable ad blockers temporarily
  • • Try a different browser
  • • Clear browser cache

❌ Page Layout Broken on Mobile

Symptoms: Interface looks wrong or unusable on phone/tablet

Solutions:

  • • Rotate device to landscape mode
  • • Zoom out to see full interface
  • • Use a modern mobile browser (Chrome, Safari, Firefox)
  • • Clear mobile browser cache
  • • Try desktop version if mobile doesn't work

Account & Premium Issues

❌ Can't Access Premium Features

Symptoms: Step-by-step explanations or advanced features not working

Check:

  • • Verify you're logged into your Premium account
  • • Check if your subscription is active (Account page)
  • • Clear browser cache and log in again
  • • Contact support if payment went through but features not working

❌ History Not Saving

Symptoms: Previous calculations disappear when page reloads

Solutions:

  • • Sign up for an account (free users have session-only history)
  • • Make sure you're logged in
  • • Check if cookies are enabled
  • • Verify internet connection for cloud saving

❌ Export Not Working

Symptoms: Can't download PDF, LaTeX or other formats

Solutions:

  • • Check if you have Premium subscription (required for most exports)
  • • Disable popup blockers
  • • Check browser download settings
  • • Try right-click "Save As" if direct download fails

📧 Still Having Issues?

If none of these solutions work, we're here to help:

• Free Users: Check our Help Center or post in Community Forums

• Premium Users: Email support@laplaceapp.com for priority assistance

• Institutional: Contact your account manager or call support hotline

• Bug Reports: Include browser version, operating system, and exact error messages